Right folks I need help. Had cold water for years moved to tropical but not as good to look at as salt so I want to have a go. I have a spare setup for a tropical tank, only a small 70 litre tank, and I'm wondering if it's possible to convert to a wee nano tank. Thinking of fish with live rock but that's as far as I get. Any advice in what I can salvage from my spare tank or anything else I need ie special lights filters water skimmer, just treat me like a muppet It would be greatly appreciated.