Guys, I have a situation that fits into this discussion somewhere. I have a 90 gallon planted tank that has approx. 4.2 watts per gallon, injected CO2 and I have been using a Milwaukie PH monitor to control the CO2. The KH runs around 4 most of the time. My PH has been running around 6.2 - 6.4 for weeks. In other words, because every time the CO2 runs, it blows the PH down quickly and the controller shuts off at 6.2. The plant growth has been minimal and I don't see any pearling at all. After reading this thread I decided to turn the bubbles up, lower the PH threshold and monitor the situation to make sure I don't nuke my fish. So far, I have managed it downward to a PH of 5.8 before the fish start moving towards the surface. Now the PH is hovering around 5.8 - 5.9. At a KH of 4, that would put the
CO2 measurement through the roof using the KH/PH CO2 Chart. I still don't see any pearling on the plants. I also dose flourish excel and other seachem ferts for macros and micros. The palnts look great and I know they are growing but I'm not seeing the kind of growth or pearling that I have seen in the past using injected CO2. Also, will my fish eventually adjust to the lower PH? Any suggestions? Thanks for letting me jump in here. Darrell |