Hi Puriti, just wondering...Where is the thermometer in relation to your heater? It may be that the 80F is only in a particular area, and other areas are cooler...or it may be that your fish have a new inanimate friend.
Maybe you could move your thermometer and see if the temp is different?
25g Marineland Eclipse (30w T-8 ):
- java ferns, anacharis, corkscrew vals, giant hygros, marimo balls, java moss
- zebra danios (5), otos (2), others TBD
6g Marineland Eclipse (8w T-5):
- anacharis, asian ambulia, java moss
- white cloud mountain minnows (10 = 6-7 inches total)