Well, I'm hooked again. Just picked up an ADA 60-P. I have a pretty good idea about the hardscape already: The lighting is a Twinstar 600ES. filtration will be an Eheim Classic 250 and an Azoo skimmer. The Eheim is maybe a bit weak for flow, but I will supplement with a powerhead if necessary. I haven't decided on plants yet, but for sure a variety of epiphytes on the wood and maybe also some moss. Probably also some crypts for the midground. I'm not sure about the foreground and background - maybe Eleocharis mini and Eleocharis vivipara in the background? Originally I intended this to be a low-tech setup with the Twinstar dimmed to 50 or 25 % but I must admit that I'm tempted to get a CO2 system for it. I am, however a bit reluctant after stumbling upon some forum threads and a practical fishkeeping article about the potential negative (and invisible) long-term effects CO2-injection can have on fish and invertebrates. PFK article https://www.practicalfishkeeping.co.uk/blog/articles/does-co2-injection-cause-disease Barrreport thread: https://barrreport.com/threads/14-ppm-co2-proven-detrimental-for-freshwater-tropical-fish.14126/ Do you think observing normal behaviour and no deaths is good enough to assure that the CO2 levels used aren't harmful? I'm not sure I think that's enough to claim that CO2 is harmless, so I'm struggling a bit with justifying CO2 injection at the moment. If someone can provide good arguments for justifying the use of CO2 (or the opposite) or just have some relevant knowledge on fish physiology and/or CO2 levels in nature you are very welcome to share it here.