the fluorite was in a 20 gallon with no fish in it. I didnt run the filter or the heater since there werent any fish, the bacteria may have died. I also had MTS int he fluorite, i figured it'd supply some amonia to the bacteria in the tank. sine I rinsed the substrate I may have killed some mts, dead snails in the substrate would suck some oxygen out too.
so it is plausable that the plants sucked out the oxygen?
all the fish seem back to normal. thanks for the help.
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