What size is your tank? The way a fan cools is by forcing evaporation, so you may need to address that. Are you running a sump? How much evap. do you have now? How do you deal with it? And again I'm involved in hijacking a thread...I gotta stop this :razz:

I don't have a top off system either but if you're on it you can add water in the morning and in the evening without an SG flucuation.
Evaporation is why fans are recomended to cool the system. Kinda like sweating is how we cool down

J

I hit 85F yesterday, as it was 30F outside. Being on the second floor with dual 400w halides isn't fun. When it's not super hot outside, my tank seems to stay around 82.9F.

Hehe, the tank is 20Gal. It usualy does not evaporate much because I have a closed canopy. When it does I top it off daily when I get home from work.

Chad, nice and simple. Top up a bit more when you get home and get a fan. Your critters will be happier (at least I think they will :razz: )

OK, I am lowering my temp.. now.. do I have to do this in a certain way? will this not change the SG?

No...if you are using a non-temp compensated hydrometer (like those floaters) you will get a different reading. They are calibrated for something like 75 degrees anyway.

Just make sure you are always measuring salinity with a temp compensated hydrometer or use a temp compensated refractometer.

I have the Aquarium Systems plastic one... Not sure if it is temp compensated?????

It kinda sorta is temp compensating. That little plastic counter weight changes density with temp changes. Not sure how accurate it is.

Well, I would like to get a better one.. but honestly I wouldn't know what to look for.. anyone wanna point me in the right direction?