Converting FW to SW

[Palmer]

I am guessing a 120 g long would take 3 bags. I wasn't planning on doing any more water changes than I normally do which is a lot. The idea was to just let it cycle and then utilize a cleanup crew. But maybe I shouldn't try this experiment.

[Coralgurl]

We left the gravel from our fw setup in the bottom of the tank when we converted and added sand on top. Never had a problem with this until I added an eel and he mixed everything up and then it was just ugly.

We had the initial algae bloom, but it cleared up and the tank ran quite well for a year.

[Myka]

Originally Posted by Palmer

I am guessing a 120 g long would take 3 bags. I wasn't planning on doing any more water changes than I normally do which is a lot. The idea was to just let it cycle and then utilize a cleanup crew. But maybe I shouldn't try this experiment.

Oops, sorry for some reason I thought this was a 41-gallon tank. I must have been reading some other thread. Hence my reference to my 50-gallon tank.

You could try it, if all else fails you siphon the sand out and try again. If you fill the tank halfway with FW, let it circulate for a couple days, then test ammonia, nitrate, and phosphate that will give you an idea where you stand.