Why does my drop checker stay green all the time?
I've been trying to get my co2 dialed in and notice once my DC turns green - yellow, it stays that way. I have plenty of flow in the tank and run a bubble wall at night...why does in not change change back to a color that would indicate a decrease in ppm of co2 early in the morning when the co2 has been of for 8 - 10 hours. I recently have had is stay yellow for a couple of days after I over did it a bit on the co2. It's important to me because I'm using it to figure out what pH to set my co2 controller at.
I'm having problems with my controller injecting too much co2 and stressing my fish and killing some shrimp after water changes. Something in my tank is dropping the pH of the water before co2 injection and prevents me from directly measuring the pH of the water to correlate co2 levels. I know aquasoil and wood can drop ph artificially. My KH is 2 and the pH has measured as low as 5.0 with no signs of stress, and recently I've killed some shrimp with a reading of 5.4 the day after a water change. I've calibrated and rechecked my controller using 7 and 4 ph standards often throughout this process and it seems to be working correctly.
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