New tank question

[sandman12]

I will be adding my 15g prop tank to my 29g display tank probably tomorrow.

Can I just add 15g of newly mixed saltwater or do I need to get some one's water from a water change? I was thinking I could use my water from water change but then It wouldn't be a water change cause I would be taking it out and putting it back in :rollface:

[adnup]

WOW thats a good question. Its like doing a 50% water change.

I dont know maybe do some small water changes and save the old water until your have your 15 gals?

good question, I'll hang around for an imformed answer...

[sandman12]

That was my original idea but I will be putting the same water back in so what's the point of even taking it out? lol, it's a stumper for me. To be safe I'll probably bumb some water of a local reefer from a water change.

I do aquarium maintance and we do 50% water changes often on 55g 's with good results so maybe I'll just add new water.....

[RedEyeElf]

Depends on what you stock in your tank currently I'd say, but even then a 50% change is used when something bad happens (dead nem ect.) with little ill effects. Some ppl recommend 50% changes to stress a nem into splitting after overfeeding

so it will stress stuff, but as long as you don't have super sensative corals, should be fine