first time heat wave experience
first time heat wave experience
most of my tanks were at 87 yesterday, and fish didn't mind. All the fish in those tanks at 87 were swimming normal, chasing each other like as usual and were eating happily whatever I threw in. However, one tank near the door went to 94, and only two species didn't take it well. I didn't know that one tank near the door got that hot. I found out when I was measuring the temp for all of the tanks yesterday.
Even at 94 in that tank, Tangs, damsels, chromis, hawkfish were all doing fine without any symptoms; however, the wrasses could only take that 94 F for 3 hrs, they started showing signs of heat stroke. After another hour, the angels started showing symptoms. Other than these two species, rest of the fish were acting normal. I was very surprised. so the msds for wrasses and angels is 93F. Wrasse 50 at 4 hrs/93F. what that means is: at 93 F if you have hundred wrasses then 50 will die in 4hrs. Take it with a grain of salt as other parameters such as dissolved oxygen etc varies from tank to tank.
Same goes for angels too at 93F.
Again, ALL other fish species were acting normal. I'm sure they would have started showing symptoms if the TEMP went up any further (not sure how many more degrees up from 94 for that to happen) or if they were kept at 94 more than 4hrs. Finally, I put some ice on that tank and brought it down couple of degree down.
Ran a 12" corrosion resistant fan sweeping the horizontal surface of the water on that tank, and the T went down to 84 within 5 hrs and today it went even further down and stays at 81 while the rest of the tanks are at 85 right now.
Very strange, surprising, and interesting findings. Just wanted to share my experience.