Hi all Needing a little pointer here. I've ordered a new aquarium from our friends at Aquariums Ltd, 68" x 30" x 24" with a 48 x 18 x 18 sump. It is to hold Discus (28C) but it has to be planted nicely those are the rules I have to abide by. Currently I have a 240l tank with a fire extinguisher CO2 producing triffid like growth but since getting the discus I'm throwing away 25% of the water every day. The sump will help me do water changes by trickling in filtered water and the excess overflowing to a drain. I understand that sumps tend to gas off CO2 more than normal external filters, so..... I'm thinking along the lines of going CO2 free (unless I can find free CO2), I've read briefly about the Diana Walsted method but that seems to require few to no water changes. I would like to have tall bushy plants to fill out the back of the 30" tall tank and look generally stunning. Is this possible or am I looking for something that will be a whole heap of trouble? I'm not adverse to researching but in this case I'm not really sure what I should be looking at. If you do know of a thread that might put me on whatever track I need I would be eternally grateful or feel free to help in any way possible. Thanks guys and..