Evaporation

[Sonicmunky]

I'm just starting a 29 gallon SW tank and have a bit of evaporation, whats the best way to deal with this? Should i buy RO water and just pour it directly in or do i need to get saltwater?

 

[RMPD109]

Top off with fresh water only. Do not use salt water. When the evap occurs the salt is left behind. Adding the fresh water will bring salinity back up to the proper levels. I use distilled water for my changes and top offs.

 

[Brad]

With a 29gal it might be affordable to use purchased R/O water. With a 29gal, you might find it difficult to hold your temperature down in the summer. A fan directed at the surface will keep the temp down, and will increase your evaporation considerably...meaning you'll use more R/O water. ($)

 

[XXFirefighter]

You add unsalted water...
I have about a gallon a day at work...
I just use RO water...

 

[SeriousDude5]

Add unsalted water as everyone else stated and I would suggest RO or distiled you can also use declorinized tap but what I found out is that its a cyno out break waiting to happen.