So iv come across a 200L tank for sale from a work friend. It's 101 x 42 x 51cm I work that out to be a maximum of 207L at the very max.. But please do correct me if I'm wrong for dosing reasons! its been running for 12 years and was resealed with receipts in June 2011. its in a bad way at the moment, gravel is a state and overrun with algae. The filters only cleaned once every 6 months n I think that's the way the waters been changed too. The filters inbuilt and it's a jewel aquarium. They have all new filter media in a box so il begin to change that gradually when it's in possession. They insist I keep the fish which isn't a huge problem, there's not many. But there is a huge silver shark in there and a few bristlenoses along with the biggest swordtail I've ever seen! He must be near 5 to 6 inches! anyway this will be a work in progress n I plan to take most of the algae eaten ornaments out over time and heavily plant the tank. I don't want to get into c O2 but I might stretch to better lighting. I. Not sure what it has at the minute. so as if I'm starting from scratch, can anyone reccomend a good substrate for live plants in the uk? And value for money lighting? end goal is to have 2x dempsies, 2x tiger oscars and a few corydoras, although I'm aware I could have the original fish for years to come. i really am open to any suggestions about any of the above as I'm fairly new to fish keeping and this will be my biggest tank! oh one last thing, any good ideas for a centrepiece? Original or quirky! Thanks in advance!