Ice packs to chill tank in summer?

[canadianbudz604]

I have never had a tank bigger then a 40g and I never have a problem with heat. A couple years ago when it was 40+ Celsius I put a solid frozen block (in a sandwich bag) In my aquaclear and the tabk stayed no higher then 80. Now I have air conditioners so I don't have to worry. Then again I have never really had any sps asides from monti plates. But the filter circulated colder water into the tank and kept the temp down.