uglystage

Our tank (125g) finished cycle at end of June after about 3.5 months. Planning on Fowlr with anemones. Since then we have added some fish slowly every 2 ish weeks (2 clowns, 1 yellow watchman, 1 tomini, 1 fairy clown wrasse, 1 royal gramma, 1 purple firefish goby, BTA). We also have some CUC...

I’ve had this 30 gal tank for a 2 months now, made sure to cycle it before. The sand gets dirty with red algee/bacteria alot, and so do the rocks. I do water changes every 1.5 weeks and frequently clean the algee of the walls of the tank. I was wondering if this was normal and if it will go away...