helotr3vor
Active Member
So today I changed the lighting to 12/12 and did the usual weekly change of water. When I adjust the pH after adding all the nutes to the 60 gallon reservoir (hydroponics setup). Usually when I adjust i just have to bring the pH level from around 7.5 to 6.0 so I slowly add pH down till after about 20 minutes my pH meter says 6.0. When I went to check up on it after about 2 hours the pH dropped down to 3.3!! This also happened last week when I changed the water and I ended up having to add about 18ml of pH up to get it back to 6.0. Any idea whats going on?