I have a 75 gallon with pressurized co2
and a finnex ray 2 with an dual T5ho aquaticlife fixture. My tiger barbs are slowly dying off my parameters are ammonia 0 nitrates 20 phosphates 1.5 nitrites 0 ph 7.2. I was running 3 bps the last 3 days and they are dropping one by one so I started to lower it now I'm down to 2 bps and they are still spending a lot of time at the top. My drop checker was lime green in the beginning and now it is a really dark green when I got home today. I use a Rex grigg 27 inch reactor made of 2 inch pvc
. Can someone please help me figure out what is wrong.