14 gal bio cube need help

[McLeish75]

Okay, I have a 14 gal bio cube and I have no idea to clean I know it's a salt water tank but I want it a fresh water tank I need all the advise I can get please help!!!! Thanks a ton

 

[sudz]

is it empty already? if you're talking bout the buildup of sludge, just some elbow grease. MAYBE CLR? Wait for others to chime in.

 

[Greenstreet.1]

Mix 50/50 water and vinegar and soak for a few then some elbow work.