Conditioner is fine for SW
, But whats the point? Its not going to take out everything else that a RO
unit does. its just a waste of money imo
Anyway, Dude.. Your tank.
You've got it all wrong, Sorry to be so harsh. But think of the fish. For one, The yellow will start having ich break outs.. No matter how you treat it.. it'll just come back, If it doesnt die.
For two, That eel, Regardless of size is way to big for that tank.
For three, Your tank has no where near enough bacteria to support all them fish.
For four, I doubt your nitrate is 10ppm very highly.
Ohh, I feel so sorry for your fish. How would you like to be stuffed in your bedroom and have to live in it with a few other people? Thats what its like for the fish.
Take the fish back, Even if you dont get anything for them. Thats just horrible.
Sorry for being harsh once again.. But wow. Learn from this and start a bigger tank if you want big things.