The fish don't seem to care much but it worries me just a bit. Yesterday I removed EVERYTHING from my 10 gallon divided tank and spent several hours setting up a soil and sand naturally planted tank. I was warned that rinsing my sand in hot water would heat my tank and I didn't use hot water but rather warm water. However once I had everything set up it was 88° in there O.O I thought my thermometer was malfunctioning because the water doesn't feel that warm, it feels the way it normally does when it's the desired 78° I acclimated my fish for almost 45 minutes before adding them and they were a little sluggish but they are fine now.
I haven't had my heater plugged in for a bit and today well over 24 hours later it's still 82° when will it cool off in there? My fish don't seem stressed and are acting normally, maybe slightly more active than normal and both are building nests but I notice they also rest at the bottom in the shadier areas a lot :/ is it too hot in there or are they just curious about the new substrate I wonder?