Snails for pufferfish from other basins
Frozen food (shrimp, Muelas, etc)
occasionally forage for shrimp
WW almost daily 1-2 liters, I take it as Blumengieswasser and fill with tap water.
Fertilizer: Pro Fito once a week.
No CO2 but the plants grow very slowly. The "grass" has determined taken a year until he was closely grown. Overall, a very easy-care pool.