No CO2 on this tank! lol I wanted to keep it very low on the maintenance, and back when i was running DIY CO2 on my 10 gal iwagumi, I always hated replacing the reactors and evetually ruined the tank by waiting too long to replace them one time. For that reason i skipped CO2 on this tank.
Carbon source is not supplied by Excel since i dose nothing in this tank. It comes from the soil under the sand. Miracle gro for all my fert and carbon needs lol.
Side note: I should not have put my marimo into this tank because now everything gets covered in nice green fuzz. looks cool though, and the marimo ball itself has reformed from a little clump and is growing fine.
Shrimp are doing ok. more females saddled, the main female has been berried for a while now. I need to get more of them out but its hard to do w/o wrecking all the plants lol!