Unexpected Evaporation Rate

[ezerasurfr]

Hey all! I have a pretty new setup and have been getting everything dialed in, but something that I've not expected is happening. My evaporation rate is super low. I have approximately 220 gallons spread across my DT (180), sump (40b) and refugium (20L.) I'm literally only seeing about 1 gallon/day evaporation.

My DT is in my office, kept around a constant 69f. I have a ceiling fan, and I open the window during the work day to help with oxygen exchange. The sump and fuge are in the garage behind my office. Approximately 1/2 of the sump is covered with an acrylic top (because it's low to the ground, to keep debris out.) and the fuge is open 2/3 with a top only over the return and drain lines to keep salt spray to a minimum.

I feel like I should be replacing more water than this :confused:

[downbeach]

My evaporation rate was about 2 gal. a day on a similar system, without any covers. When I went on vacation I would cover the tank with a couple acrylic sheets, and that would cut the evaporation down to about 1 gal. a day. I kept my tank at ~ 78f. So, temperature, relative humidity and the covers are playing a part.

[ezerasurfr]

Fantastic! Like I said, it was just a little unexpected. I should be pleased I guess with the good conditions.

[mcgyvr]

wait for winter... it will change..
Its just humid now so evap rates are lower..

[MiddletoM]

im losing 4 litres a day on a 160g system!

[pyithar]

im losing 4 litres a day on a 160g system!

we have similar evaporation rate.

[SNAKEMANVET]

During the summer months I lose about a gallon a day,like mcgyvr said wait until winter gets here.I lose around 3 gallons a day on my system.180 dt,75 gallon sump.