platypusmann
Well-Known Member
I am running a 40 gal res ebb&flow, and my ph is driving me nuts!!! I have been using a solution drop test, and have been able to stabilize my ph in the orange zone (5.5 to 6.5). THEN....I got a digital PH tester that apparently doesn't work. I changed out res completely, and tested ph with digital tester....7.8. Added 50 ml of PH down, and 7.7......added 50ml more (it usually takes 150~250 ml for my res) and 7.6.....so I added 100 ml more.....and tested again with digital......7.3. WTF!!! I decided to test it with the solution tester and BAM.....in the red, which means UNDER 4.0. So I added one tablespoon of baking soda.....and now my res is cloudy as hell, and ph is over 8.5!!! SO...I began adding PH down (from my aquarium set up, as I ran out of GH brand) and have added over 150ml and PH is still over 7.0, and res is still cloudy from baking soda. I am 4 hours from next feed, so the plants are as yet unaffected but I am at a loss......I need stable ph!! Any suggestions????