Planted Tank Enthusiast
Join Date: Dec 2016
Location: CT River Valley, CT, USA
Thatís pretty strange. Normally, your drop checker is going to show you what the conditions in the tank were about an hour earlier.
You mentioned that youíre running your CO2 through a reactor. Is the reactor before your filter, or after? Just guessing, but I bet the reactor was letting bubbles escape, and they got trapped in your filter. Even after the CO2 turned off, you still have a significant amount of CO2 build up in the filter. It will continue to dissolve until itís gone. If your reactor is before your filter, try putting it after instead.
You can also verify that this is causing the problem by taking the filter apart. You can clean it if you want to, but just opening it will vent any CO2 that may be built up. Open the filter, pour out any water (to dislodge bubbles), reprime and restart it. If your drop checker goes back to blue in an hour or so, then you know that was your culprit.
If you ever think you're too small to make a difference, spend a couple of nights sleeping with a mosquito.
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