whats the most to Topoff a day

[jarrett shark]

well I have a 220gal with 3 400w MH that are sucking about 4gals a day up?
is this to much water to top off?

 

[gonzapa]

All of our tanks evaporate different amounts of water depending on your house conditions.
My 180 goes from 3 gallons a day in winter to 3 a week in summer. As long as you have something replacing the water to keep the salinity stable I dont think it really matters how much it actually evaporates

 

[Steve175]

I am adding 18L of Kalk (4.75G) per day with a similar sized system; Litremitre highly recommended if you don't already have a topoff system.

 

[pecdo]

i loose 1-3 gallons a day from my 75dt with 75g basement sump depending on time of year. using good quality water for topping off is also important, otherwise impurites in the topoff water can build up over time in the system and be hard to manage without large regular water changes