ATO and evaporation??

[Knightreef]

I have a 70 gallon tank and my sump has a 4 gallon RO chamber for ATO. It seems that the ATO is replacing quite a bit of water in a 12 hour period. I've recently started marking the side of the glass with the time to try and measure exactly how many gallons are being used. I assume this is all due to evaporation since i don't have any water from a leak on my floor. It would make sense during the daytime with lights running, but I am having the same loss at night without lights. Normal??

 

[redfishbluefish]

Sounds normal. I have a ninety gallon and evaporate between one to one and a half gallons per day. ATO reservoir is about 11 gallons.

 

[Dal-Reef]

Yep very normal. I have 60 gallon tank with a 6 gallon ATO container and have to refill every 5-6 days. I also depends on the time of year how much evaporation you will see.

 

[stanleo]

I worried as well when I went from a small sump to one that is double the size that I was having too much evaporation but after more than a week with an ATO and going through more than a gallon a day my salinity stays the same. I am going to have to do a bigger ATO reservoir cause I have to refill this five gallon bucket every four days and it’s annoying.

 

[glb]

Sounds normal to me.

 

[chris k.]

I have approximately 150 gallons between 2 tanks and 1 sump i use about 6 quarts of h2o per day

 

[The0wn4g3]

Sounds about right, my 5 gallon buckets lasts about 3-5 days before I need to refill it.

 

[Mical]

+100 on normal. If you have screen/open top that's pretty good actually. Many of us use glass lids to slow down evaporation. My 65 & 120 when using screen lids go through about 6 gal per week ea, w/glass lids it's closer to 3-3.5gals per week.

 

[Reefnoobz90]

For me it's worse in the winter with the low humidity in the house but on a positive im adding humidity to the living room which is nice. But yeah sounds completely normal