Top off water, heated or not?

[dmolavi]

I know that if I just grab a gallon of it and dump it in the tank all at once, it needs to be heated, BUT...

...what about when using an ATO that adds only a little at a time? Does the ATO reservoir still need to be heated, or can it be at room temp?

[Terrance]

No heat in ato for me. Less evaporation that way.

[spoonman]

My ATO is at room temp also. Usually there is only a few degrees difference between my room temp and tank temp though.

[Terrance]

I think it would make more temperature fluctuations for a ATO reservoir sitting in a cold room, and it hooked up with a tiny nano tank.

Use your best judgement, or trial and error prior to getting corals.

[Phranque]

I keep a pitcher of RODI in the kitchen at room temp..... I usually add a cup or two daily to my 28. That little bit is going to blend in quickly, and won't make a big difference..... a drip ATO definitely won't need to be heated.

[kwandrsn]

I add about 6-8 cups of ro water a day in a 36gallon tank. I just have a bucket of water sitting in the room. No heater.room temp about 72 tank temp 78-79. Never had any problems