I'd love some super creative people for this one! I've made several posts about this, but I have a better laid out plan this time. 48 x 12 x 24 Gravel substrate, average 1/2" wide, 1-3" thick Cascade 300, TopFin 20-30 (150gph). Soon to be added: overhead planter/filter 130 gph and either a 600 or 800 gph water pump. Stocking: stunted 5" common goldfish, 3 amano, 2 mystery snails. Guaranteed addition in the upcoming months: 3-5 hillstream loaches, 6-10 more mystery snails, more amano shrimp. Requirements for new additions: must pose zero risk to my goldfish, shrimp, and snails, not be known to eat plants, be able to tolerate temps 65-75, gravel substrate, and high flow. Also, I'd like to add some WCMM, but I am concerned my goldfish may try to eat them and choke, mouth ~1/4" I'd like a little more activity in my tank, and my nitrates haven't even hit fifty yet, and it's weighing on my plants. I'd love suggestions on little oddballs.