First breakout topic, sump design. Thoughts behind design below. Overflow at tank will skim surface and thus remove film. Gyre pump is below surface so little to no surface agitation. Thought being to reduce losing CO2. Drain into sump is into an aeration chamber to oxygenate the water for the filtration. Looking for thoughts on this. From here, it flows over an algae scrubber (small led light is above this section) and initial 10ppi filter. From here, space for various ideas, probably Indian olive leaves (Catappa), other "additives", and possibly grow out. Then thru the sequence of poret sponge filters. 3" thick with exception of last polishing one at 2". Then to return pump which will dump at opposite side from gyre pump to force "clean CO2 enriched" water down and across bottom. Open to thoughts ideas!!