Evaporation Rates

[wpeterson]

Hey guys,

We've got our new 90 gallon DSA tank up for a few weeks now in CA. I'm running it open top (w/ clear mesh netting lid) - so I expected a good amount of evaporation.

With our ATO setup, it looks like I'm adding almost 1 gal of RODI a day. Display volume is 90gal, sump is another 30 gal.

Is that normal? How much do you top off per day during the winter months?

-Winfield

 

[Pat02026]

Sounds about right, I average a 5.5 gal auto top off tank every 5-6 days in my open top 90.

 

[reefstarter]

yep thats about right , depends on tank temp type of heat in house , etc . I add about 5-7 gallons a day in my basement system of 550 gallons you can wrap the sump with insulation to help a bit . That reminds me need to check the 90 sump lol

 

[wpeterson]

Thanks!

 

[Rone]

Same here open top about 6 gallons a week.

 

[hvusalt]

i have 3 tanks in the house- a 120 with 50g sump and 2 75 with about 30-50ga sump for each. so i added around 15g for top off. 15 gallon of water evaporated in the house. hopefully these avaporation dont cuase problem for the house and air that we breath daily.

 

[reefstarter]

As long as room humidity stays below 60% you should be good

 

[this is me]

Evaporation varies from tank to tank set up and season. But your evaporation rate sounds about right.
Keep in mind though, a larger surface area tank, ie. shallow tank with large footprint will have more evaporation than a tall tank with a smaller footprint. The more surface flow you have, the more evaporation you will have also. Running a fan in the summer time will also caused more evaporation.

 

[NH Fish]

sweet idea about insulating the sump. My basement is about 64*. That should help out with the heat a little. Think I'll cover it too.

yep thats about right , depends on tank temp type of heat in house , etc . I add about 5-7 gallons a day in my basement system of 550 gallons you can wrap the sump with insulation to help a bit . That reminds me need to check the 90 sump lol

 

[reefstarter]

Not my idea but I'll take the credit lol