Roseman
Elite Rolling Society
pH
I am starting to soak my air stones and cubes in pH water of 6.0, and I want to discuss pH here.
pH, oh so important.
pH is measured on a scale from 1.0 to 14.0. Pure water has a pH of 7.0 and is considered pH neutral. pH below 7.0 is considered to be acidic and pH higher than 7.0 is considered to be alkaline.
A substance that decreases pH (pH-down) is called an acid while a substance that increases pH (pH-up) is called a base. A substance that helps nutrient solutions resist pH changes when an acid or base is added, is called a buffer. ..or stabilizer.
A pH difference of 1.0 is equal to a ten times increase or decrease in pH. That is, a nutrient solution with a pH of 6.0 is ten times as acidic as a nutrient solution with a pH of 7.0. A pH difference of 2.0 is equal to a hundred times increase or decrease in pH.
It is very important to keep the pH level in your water within certain limits when growing marijuana. Most grow-books say strive for 5.9, or some books say 5.6 to 6.2. Some books say 5.5 to 6.5, and you will not find two books that say the exact same thing. Growers need to monitor the pH of their nutrient solution and keep it within recommended levels.
The pH level of your hydroponic nutrient solution will determine how well your plants are able to eat and absorb nutrients. If the pH level is out of the proper range, the growth rate of the plants will slow down or stop.
Almost a 1/4 of all the problems I read about that growers experience are due to pH problems.
There are pH meters and test strips to test the pH of your water.
There are additives, or chemicals, made to adjust it, called pH UP and pH Down. These additives are to be used in very small amounts, like one gram, or 1/4 level teaspoon per gallon of water. (just a pinch)
First you have to realize that the pH is going to change daily as the nutrients are eaten. That means adjusting it daily. Goal is that those daily changes be slight and not major or drastic. And too remember, different sources of water yield different pH problems.
You have to have pH balanced nutes, and normal regular water or a buffer or a stabilizer in the water to keep it from roller coasting and spiking up and down.
I've done some research on pH Control and I 'd like to offer some advice and my opinion.
NEW growers worry about it too too much, and the biggest mistake they make is trying for a perfect contstant same pH.
You will do better, to just try to keep it between 5.6 and 6.8 without changing it often. Plants eat more nitrogen at 5.7 to 5.9 than at 6.7 to 6.8. But they eat more iron and magnesium at 6.5 to 6.8. You need a fluctuating pH level for your plants to absorb different nutes at different levels.
When you prepare your water, add nutes and pH test it, no matter what the results, if it is between 5.6 and 6.4, leave it alone or only adjust it slightly by .1 to .2 down.
Do NOT try to make it exactly 5.9.
DO NOT PLAY the pH Game.
Do NOT ride the pH Roller Coaster.
Do NOT adjust it more than .5 in 4 hours.
It is better to be off, too high, or too low, than to adjust it too much at one time.
Drastic or FAST adjustments really mess up the entire system.
Adjust gradually, and slowly.
The pH should not vary more than .5 to .7 everyday, and if it does flucuate alot more up OR down daily, something is wrong.
First, ask yourself, IF growing in HYDRO, what is going into the tank? Water, Nutes, pH UP and Down should be it. Adding anything else, WHEN YOU DO NOT HAVE A PROBLEM, is not the wisest thing to do. (Yes, sometimes some small amount of peroxide or hydrozyme might be needed, but I've done 7 grows without it.)
And if you are making NUTE SOUP, ( a nute mix and supplement mix of more than two nutrients) I can not help you or advise you about your pH.
Except for the very first time you add the water to the tank, You should pH balance your water FIRST, everytime, outside of the tank, then add the nutes, pH balance it again, then add it to the tank. Rule of thumb is your pH should not go up more than .5 within one 12 hour day or 1.0 in 24 hours.
If it does go up more in one day or two days, you got to do something to stabilize it. After the first two or 3 weeks pass, and the plants are drinking a gallon a day, you can add one gallon back that is over adjusted or over compensated, to get it back down. FOR EXAMPLE, If the tank is reading 7.2, then add one gallon of 6.2, and you'll get it down SOME, without it being too drastic.
DRASTIC pH CHANGES WITHIN 24 HOURS ARE VERY DANGEROUS.
IF YOU ARE HAVING A PROBLEM, AND ONLY IF IT IS GOING UP AND DOWN WILDLY, then try adding a lump of charcoal or two, tied in a panty hose or nylon stocking to the tank.
OR
Go to Walmart or PetSmart to the Aquarium Dept, next to the fish food, filters and additives and sea salts, and get those little packages of Ammonia Control absorbent packets. They look like little sponges in a wrapper. They work great to stabilize the pH. Or get the Ammonia control packets and add a couple to the tank.
IF YOU ARE HAVING A PROBLEM, AND ONLY IF IT IS GOING UP AND DOWN WILDLY, and you need a remedy then get everything in your tank like you want it, (except the roots or plants,) and add two heaping tablespoons of baking soda to a gallon of water,Stir it good, then add it to the tank. Wait ten or 15 minutes, then pH adjust it again. Then it should stay stabilized until the next Drain and Replenish.
From the book:
A buffer solution is an aqueous solution consisting of a mixture of a weak acid and its conjugate base or a weak base and its conjugate acid. It has the property that the pH of the solution changes very little when a small amount of acid or base is added to it. Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical applications.
IF YOU ARE HAVING A PROBLEM, AND ONLY IF IT IS GOING UP AND DOWN WILDLY,
you can simply add two heaping table spoons of baking soda to your water, (before you put it in the tank). Yes, it will wreck the pH, but then you adjust it with pH Down, OUT OF YOUR TANK, and then it will stay more stable for a few days longer.
Primarily what one needs to add to the water are neutralizers and buffers that will stabilize the acid and alkaline levels to the degree that is required for the plants. Most of these stabilizing products are sold in great volume at any pet store that specialized in aquariums and tropical fish and if one is not familiar with what product to purchase, then one should consult with the qualified salespeople so as to arrive at a specific product that will properly address the specific needs of the fish and their owner. You want something that reduces the acid.
I am starting to soak my air stones and cubes in pH water of 6.0, and I want to discuss pH here.
pH, oh so important.
pH is measured on a scale from 1.0 to 14.0. Pure water has a pH of 7.0 and is considered pH neutral. pH below 7.0 is considered to be acidic and pH higher than 7.0 is considered to be alkaline.
A substance that decreases pH (pH-down) is called an acid while a substance that increases pH (pH-up) is called a base. A substance that helps nutrient solutions resist pH changes when an acid or base is added, is called a buffer. ..or stabilizer.
A pH difference of 1.0 is equal to a ten times increase or decrease in pH. That is, a nutrient solution with a pH of 6.0 is ten times as acidic as a nutrient solution with a pH of 7.0. A pH difference of 2.0 is equal to a hundred times increase or decrease in pH.
It is very important to keep the pH level in your water within certain limits when growing marijuana. Most grow-books say strive for 5.9, or some books say 5.6 to 6.2. Some books say 5.5 to 6.5, and you will not find two books that say the exact same thing. Growers need to monitor the pH of their nutrient solution and keep it within recommended levels.
The pH level of your hydroponic nutrient solution will determine how well your plants are able to eat and absorb nutrients. If the pH level is out of the proper range, the growth rate of the plants will slow down or stop.
Almost a 1/4 of all the problems I read about that growers experience are due to pH problems.
There are pH meters and test strips to test the pH of your water.
There are additives, or chemicals, made to adjust it, called pH UP and pH Down. These additives are to be used in very small amounts, like one gram, or 1/4 level teaspoon per gallon of water. (just a pinch)
First you have to realize that the pH is going to change daily as the nutrients are eaten. That means adjusting it daily. Goal is that those daily changes be slight and not major or drastic. And too remember, different sources of water yield different pH problems.
You have to have pH balanced nutes, and normal regular water or a buffer or a stabilizer in the water to keep it from roller coasting and spiking up and down.
I've done some research on pH Control and I 'd like to offer some advice and my opinion.
NEW growers worry about it too too much, and the biggest mistake they make is trying for a perfect contstant same pH.
You will do better, to just try to keep it between 5.6 and 6.8 without changing it often. Plants eat more nitrogen at 5.7 to 5.9 than at 6.7 to 6.8. But they eat more iron and magnesium at 6.5 to 6.8. You need a fluctuating pH level for your plants to absorb different nutes at different levels.
When you prepare your water, add nutes and pH test it, no matter what the results, if it is between 5.6 and 6.4, leave it alone or only adjust it slightly by .1 to .2 down.
Do NOT try to make it exactly 5.9.
DO NOT PLAY the pH Game.
Do NOT ride the pH Roller Coaster.
Do NOT adjust it more than .5 in 4 hours.
It is better to be off, too high, or too low, than to adjust it too much at one time.
Drastic or FAST adjustments really mess up the entire system.
Adjust gradually, and slowly.
The pH should not vary more than .5 to .7 everyday, and if it does flucuate alot more up OR down daily, something is wrong.
First, ask yourself, IF growing in HYDRO, what is going into the tank? Water, Nutes, pH UP and Down should be it. Adding anything else, WHEN YOU DO NOT HAVE A PROBLEM, is not the wisest thing to do. (Yes, sometimes some small amount of peroxide or hydrozyme might be needed, but I've done 7 grows without it.)
And if you are making NUTE SOUP, ( a nute mix and supplement mix of more than two nutrients) I can not help you or advise you about your pH.
Except for the very first time you add the water to the tank, You should pH balance your water FIRST, everytime, outside of the tank, then add the nutes, pH balance it again, then add it to the tank. Rule of thumb is your pH should not go up more than .5 within one 12 hour day or 1.0 in 24 hours.
If it does go up more in one day or two days, you got to do something to stabilize it. After the first two or 3 weeks pass, and the plants are drinking a gallon a day, you can add one gallon back that is over adjusted or over compensated, to get it back down. FOR EXAMPLE, If the tank is reading 7.2, then add one gallon of 6.2, and you'll get it down SOME, without it being too drastic.
DRASTIC pH CHANGES WITHIN 24 HOURS ARE VERY DANGEROUS.
IF YOU ARE HAVING A PROBLEM, AND ONLY IF IT IS GOING UP AND DOWN WILDLY, then try adding a lump of charcoal or two, tied in a panty hose or nylon stocking to the tank.
OR
Go to Walmart or PetSmart to the Aquarium Dept, next to the fish food, filters and additives and sea salts, and get those little packages of Ammonia Control absorbent packets. They look like little sponges in a wrapper. They work great to stabilize the pH. Or get the Ammonia control packets and add a couple to the tank.
IF YOU ARE HAVING A PROBLEM, AND ONLY IF IT IS GOING UP AND DOWN WILDLY, and you need a remedy then get everything in your tank like you want it, (except the roots or plants,) and add two heaping tablespoons of baking soda to a gallon of water,Stir it good, then add it to the tank. Wait ten or 15 minutes, then pH adjust it again. Then it should stay stabilized until the next Drain and Replenish.
From the book:
A buffer solution is an aqueous solution consisting of a mixture of a weak acid and its conjugate base or a weak base and its conjugate acid. It has the property that the pH of the solution changes very little when a small amount of acid or base is added to it. Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical applications.
IF YOU ARE HAVING A PROBLEM, AND ONLY IF IT IS GOING UP AND DOWN WILDLY,
you can simply add two heaping table spoons of baking soda to your water, (before you put it in the tank). Yes, it will wreck the pH, but then you adjust it with pH Down, OUT OF YOUR TANK, and then it will stay more stable for a few days longer.
Primarily what one needs to add to the water are neutralizers and buffers that will stabilize the acid and alkaline levels to the degree that is required for the plants. Most of these stabilizing products are sold in great volume at any pet store that specialized in aquariums and tropical fish and if one is not familiar with what product to purchase, then one should consult with the qualified salespeople so as to arrive at a specific product that will properly address the specific needs of the fish and their owner. You want something that reduces the acid.
