Hi All Im Dave from South Shields This morning I sold up my livestock corals etc from a 5 foot Marine tank as I need a new project and want to do a planted discus tank ......WITH RO WATER.....now the very rude caps bit is important. I am starting with tap water then will be replacing with top up RO water to gradually convert tank and fish to RO. So my questions are I have a blank canvas, here is pic with doors off when it was new (hopefully) to give an idea. Substrate I want something that is cost effective and proven without being ripped off by a rebranded product prefer make your own heard playsand is good?? Will RO (reverse osmosis) water be a problem for a planted tank? I am running 2 banks of LEDS across the tank adjustable with day and night again will this be a problem? I have a 36 x 15 x 18 sump how best to utilise this for a planted tank. The only thing I definetly know is that I want Discus with Corydoras and if possible the dwarf grass other than that I know nothing. There is a few questions above but even answering one will be appreciated I am basically just about to get the filtration sorted in the sump and continuing clean up. Thankyou in advance for any help I am determined to do this and will post pics etc and hopefully be a decent forum member after many years on the marine forums. So please share your knowledge with this and I cant believe I have to say it NOOB ....lol im a noob again feels quite exciting hehe.