Saltwater to Freshwater ?

[squeedunk]

I just purchased a 150 gal. tank that was used for saltwater. A few questions:

What can I use to safely scrub off the crusty brine, etc... from the glass ?

It came with a Bioball filter that is supposed to be used for up to 250 gallon tank. Can I use it for freshwater now ? If so, how do I convert it ? How can you tell if the bioballs need replacing, or cleaning if possible ?

Is it safe to use coral and other saltwater rocks in a freshwater tank ?

Can you use food designed for saltwater fish, for freshwater fish ?

[Drumachine09]

Warm water and a sponge works well if its acrylic or glass. If its glass, you can also use a razor blade. Dont use it on an acrylic tank though, it will scratch.

[squeedunk]

Thanks a lot !!

[Drumachine09]

Yup, anytime.

[cocoa_pleco]

and rinse the media. Ive used saltwater sponges and all that for FW too. SW rocks cant be used as they buffer PH

[Fishguy2727]

Most likely no for the food, unless it is New Life Spectrum. For the rocks it depends on what fish you are wanting.