Hi, is there anything I can add to my 52 Gallon Planted Community Aquarium? It’s 200L, 100x40x55cm and runs a Fluval 307. Stocking right now is 1 angelfish, 10 neon Tetra, 4 cherry barbs, 3 guppies and 3 mollies, 4 Otocinculus, 5 albino corydoras and a Siamese algae eater. 2 water changes a week, a 25% and %50.