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Discussion Starter · #1 ·
Hello folks,
I have a shrimp tank that's about 2.5 years old. The substrate is UNS controsoil and the input water is RO + Salty Shrimp GH+, which measures about pH 6.2. (But it's not a strong buffer, so that doesn't mean too much) For the longest time, the tank has been sitting at pH 6.6, but recently I added peat to bring down the pH to 6.1 +/- 0.1 day / night. It held that value for about a month, and then started drifting up again. Any idea what the cause could be?
Could it be the shrimp food? (Which has calcium)
Also I noticed that every time I dose H2O2, the pH goes up by 0.1 or 0.2 points for a few hours, then falls back down.
 

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Are you using a pH meter to measure or color indicator? If a meter, have you calibrated it recently (ideally each time you use it)? That could account for an apparent drift in pH.
 

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Discussion Starter · #3 ·
pH probe, constantly in the tank
I calibrate it against the input water at 6.2. It hasn't drifted much in a long time.
 
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