algae on redsea 34gal

[swaziland]

algae on redsea 34gal

[hr]
Getting brown algaeon glass more than usual. Live rock, some basic corals, lights that come with the redsea, I do use distilled water for topoffs, I had this issue with another tank, started killing corals, lights on for 9 hours 2 55ws. weekly water changes. HELP

 

[geoj]

Adding a sand bead and 7 Astraea snails would help.
Having no silicates, phosphates, or nitrates in the water will put a hurtin on the algae.