Green Algae on subsrate

I am just wondering which inverts I can purchase to add my reef tank to remove green algae off the substrate. I have astrea snails which eat the algae on the glass and LR; but they dont seem to eat off the substrate.
This is my CUC list:
2 emerald crabs
5 hermit crabs
8 astrea snails
1 mexican turbo snail

aquarium size: 30 gallons.

 

You really shouldn't have green algae on the sand. Is it a green cyano, or more like green hair algae? How old is the tank? What is your stock list, and how much do you feed. What lights do you have, how old are the bulbs, and how long is your lighting period? What do you mix new salt water with and top off with?

Just trying to get to the bottom of why you have it in the first place. Otherwise you are just looking at a bandaid instead of fixing the problem.

 

Pics would help diagnose this problem. I know tiger conchs love eating stuff off sand

 

Marshall O has a good point. Find the source of your excess nutrients and that will solve your problem. Can i assume that this is a new tank? Be patient and look at things one step at a time. I d start with looking at how much you feed. Also, just because your "params are zero" does not mean that you do not have excess nutrients... they are just being used up by the algae. Good luck and keep posting until you find the source!

 

Yes sounds like a cyano problem. They are usually caused by aquarium water with excess nutrients like phosphate, nitrates etc. You can try and siphon out what you can to remove the algae in the short term. In the long term you may have to examine how you care for your tank. There are some commercial dry foods also contain excess nutrients and other undesirable things like nitrates, phosphates etc so I strain/rinse my fresh/frozen foods before feeding my tank. You could also try adjusting your photo period, adding more flow, check if your RO/DI catridges need to be replaced or use a good salt like Tropic Marin or similar high quality brands.