Well currently I have a nano 9 gallon all in one tank from oceanfree. No chiller , add in one hang on box to give the tank extra 1.5 liter of water. I am using a fluval skimmer. The temp was always swing. So far I maintain at sg 1.025
Temp might up to 31. But some time I do on my aircon and water temp might drop to 25 or 24.
All is softie, yuma and zoanthus.
Is a frag tank so far so good finger cross.
I only have 1 holloween crab in the tank.
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