I forgot to mention the contents of my aquarium

For the substrate i have two layers one is clay based (not sure what its called) and the top layer is sand. I have a few plants but im not sure what there called..so if anyone recognises any of them let me know

the rocks and drift wood i got from the lake near me ( i boiled the drift wood for a while before adding it to my aquarium) ok so now on to my fish friends
2 gouarmis 1 gold 1 blue
2 sharks 1 red tail 1 rainbow
2 SAE
3 blueberry tetras (im not sure if that is there actual name)
2 neons ( 1 neon is missing a eye! poor lil fella, but he is doing well none the less)
2 guppies
2 apple snails
right now there in a 30g. I have a 90g given to me being cycled at this very moment. I'll be moving them all to there new home when the tank is done cycling.