never thought my tank would be this ugly

[jess128]

Well I'm very disappointed with my tank at the moment. It's only 5 months old and has 2 clowns and a yellow tang, and it's really gross looking. The glass is always covered in algae. I scrub it off and it's back the next day. Recently I've got these light purple dots on the glass that are really hard to scrub off. The substrate is dirty and has some algae spots, there are these brown algae plants growing on 2 of my rocks, and there are always salt deposits on the outside of the glass. I'm really frustrated! There's not much of a cleaner crew, just some turbo snails and hermit crabs. Is there anything I can add to help my problems? Any ideas? Thanks.

Jess