I have a 55g mixed biotope lagoon setup with 1x pictus, 4x upside down cats, 1x oto, and cherry barbs in the near future. I also have 3x Cyperus Helferi and an Amazon Sword with small and medium pieces of natural driftwood with silica substrate. My last water tests were 5 dkH, 8 dGH, and pH of...