Is it me or the heater?
I have a 20g tank, and I am using a Hydar 100w heater. I have it set to the maximum setting, 87ºF, but I have seldom seen the tank over 75º. This is the very bottom of the tolerable range of temperature for my tetras. This become a big problem when I do water changes and the temperature drops below 70º and often stays there for almost 24 hours. This seems like it would be very stressful for my fish. Is it something I'm doing wrong, or is the heater just being unreliable, and if so, which brands of heaters have you guys found to be consistent?
EDIT: The tank is also near a window, so that might be the problem, I guess.
sounds like you need a bigger heater
That makes sense - one more quick question, though. If I get a heater that could potentially be "too much" wattage for the tank, it will not overheat the tank or anything, will it?
I've got two of these on a 100gl:
Visi-Therm Deluxe 300W 13 1/2"Heater
One is set at 78, the other at 82, which keeps my tank at 78 degrees.
I've got another 25W in a 6gl set at 87 to maintain the tank at 80 degrees.
I agree that you'll need a higher wattage of heater to get your tank up to 78 degrees.
Ok - I'll probably get a 150w next time I go to the store.
I am thinking you may have a faulty heater. 100w should be able to heat your tank. When buying a new one it is always better to go with more watts, then the heater is not working as hard to heat the tank. You may just have to turn down the heat setting to get your tank at the desired temperature.
Yeah, the heater's always been pretty unreliable, so I think I'll get a 150w to get rid of the problem for sure.
also when you do a water change you should put the water in at the same temp as whats already in the tank. so if the tank water is at 75, the fresh water should be at 75 also or at least real close.
I've been wondering about that lately too. Do you just use the hot water from your tap? If that's what you do, do you gt any problems with mineral buildup in your water heater changing the water quality?
It does not seem to effect my water quality. Its not a bad idea to just let the water run for a minute before using it, to kind of flush it out.
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