I had a malfunction in the heater for a 125 G housing one Oscar and two sevs.
The temp rose overnight from ~74F to ~95F. The fish look good. I pulled the plug & will discard the bad heater. The temp dropped to ~90F in the last three hours. I opened the glass lids & temporarily have egg crate up there. I added 1 gallon of tap temp water and have two frozen smallish water bottles floating inside.
I can easily adjust the temp by a pwc & more floating frozen water bottles. The problem is I don’t know the best rate to get the temp down to where it was before.
The temp rose overnight from ~74F to ~95F. The fish look good. I pulled the plug & will discard the bad heater. The temp dropped to ~90F in the last three hours. I opened the glass lids & temporarily have egg crate up there. I added 1 gallon of tap temp water and have two frozen smallish water bottles floating inside.
I can easily adjust the temp by a pwc & more floating frozen water bottles. The problem is I don’t know the best rate to get the temp down to where it was before.
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