New Tank: 34 Gal RedSeaMax. Losing good amount of water in tank.

[AJimmy419]

Hey guys. Got a 34 gal redseamax and set it up about a week ago. The previous owner gave me his water, live rock, and sand. Looks like my tank is losing a good amount of water. I know I have to do a "top off". I would say, if your looking from the outside, the water level is about a half an inch below where the top of the tank meets the glass. I went out and got a bunch of Poland Spring distilled water. My question is, is it okay to add a gallon at one time, for the top off? Is that way too much? How much should i add? I ordered a refractometer but won't be getting that for a couple days. Thanks.

[Scuba_Steve]

Just fill it back up. If you had fish, they don't react well to sudden salinity changes. Without fish you can make pretty drastic changes without worry.

[AJimmy419]

Just fill it back up. If you had fish, they don't react well to sudden salinity changes. Without fish you can make pretty drastic changes without worry.

All I have in there is a couple coral frags, maybe 3, and that's it. So your saying it's okay to add a full gallon of distilled?

[Beanfish]

I would just fill it back up where it the water level usually is. With that being said, without fish you'd probably be alright to add a gallon. I've added a half gallon to my 14 gallon tank when I knew I'd be away for the weekend with no issues and I have fish.

[AJimmy419]

Done. Thanks everyone.