brown spots on live sand and rock!?


Hey bay area reefers , i wanted to get some help with my new tank its been up for 1 month know my ammonia 0
Nitrite 0
Nitrate 0
Ph 7.9

im noticing some brown spots on my rocks and also my live sand i have no clue what it can be
I own 2 clownfish looking into adding corals sometime this week. If anybody can tell me how to remove does brown spots or is it normal!? would apreciate if anybody can help me has me going crazy


Staff member
Normal. Don't stress.

I would add a snail or two to help clean things up.
Trochus are great for that.
You can ignore diatoms, but eventually you will need a clean up crew for real algae, so you can start now.
But do not add a ton, especially this early.

At one month, with diatoms just starting, you might want to hold off for a bit on coral.


Supporting Member
Diatoms show up towards the end of the cycle. Toss in a CUC (clean up crew) to take care of the algae.