Fish for Alge help?

Just started a new 29 gallon reef tank for my unborn son (good excuse, right;D)
In the tank i've got a False Pecular Clownfish,shrimp goby, bi color blennie, sand sifting goby, and a small green blennie.
I plan on a Sixline Wrasse and thats about it.

My problem is alge. It seems to be growing in the sand, on the rocks and on the glass to the point that it is so green you can't see in.
I want to know if there's a fish i can add that will help control the sand and rock alge? Even if it has to be removed in the future as it grows(the fish) i can put it in my 210.
Will a yellow Tank help?

I am going to get some snails but i need help with the rest.

 

You can not put a yellow tang in a 29.
I would recommend finding the source of the algae. What do you have as far as filtration.
You also have quite a bit of fish for a 29g. Would need a small skimmer to keep up with the bioload in my opinion.

Whats your nitrates at?

 

perameters check out fine.
I am aware the tank size is not conducive to a Tang but like i said it would be just temporary and then it will be moved into my bigger tank.
I've got a hang on filter with two slip in cartrages.

I also do not think my bioload is much as other then the Clown and sandsifter the other 3 fish are only an inch or so big.

 

I believe size matters with bioload but also the characteristics of the fish's eating habbits as well. My Algae blenny took care of all my algae in my tank. But I dont think having another blenny in there will be safe...