Help with algae

[1fastrock]

Hello everyone

I am having a small problem in my tank that I want to get ahold of before it gets out of hand. I have a little bit of algae all over the rocks but especially in shaded areas. It is a 90 gallon reef tank with a sump carbon and gfo in a reactor and a protein skimmer and also have 2 Jessie lights. Everything in the water seems to check out normal and I have a healthy amount of hermit crabs for a clean up crew. I have attached some pictures and would appreciate any help

 

[Ron Reefman]

How long has the tank been running?
Do you run a refugium with your sump?
OK, you have carbon & GFO, but what are your nitrate and phosphate levels?
Kind of off point, but what the heck are 'Jessie' lights?
What kind of spectrum are they?

 

[1fastrock]

The tank has been running about 9 months now and has been doing fairly well. I am running a 3 chamber sump with filter socks, then a ceramic brick in the middle chamber then a return chamber. I have not incorporated a refugium yet. I

As far as nitrate and phosphate levels I have included some pictures of my latest test.
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It looks to me like everything is at or nearly at zero which is why I am also confused.

I apologize I ment to type Kessil lights but somehow my phone corrected to jessie for some reason. Sorry for the confusion. This a photo of the light schedule I am running. I currently only have 1 piece of coral that isn't doing too hot after a mishap with my auto top off.

Thanks again for any advice you can give

Steve

 

[vetteguy53081]

A few things here.
Nitrate will have little impact as Phos Will. Don't think that kit has Phos in it and API are highly UNreliable.
Light and inorganics are contributors to algae also. Is your tank by chance at or near a window??
Even with shades closed, you will get indirect light and UV.
CUC, you mentioned crabs. They'll do little, however do add:
4 of each. . ..
Turbo snail
trochus snail
astrea snail
nassarius snail
And a couple of margarita. These all will destroy algae in some form.