clear jelly like algae on rocks

[Kieth71]

I have a clear algae growing on my rocks and i cant seem to get rid of it.I thought it was dinoflagellates at first and maybe it is but i cant seemt o get rid of it.Here are a few pics and even though it is hard to see in the pics i hope i can get some ideas on how to rid myself of it.I have tried to keep ph high as i thought it was dinos but have been trying for a long time.it will grow on tank as well but that can be removed easily.It will also grow on the coral plugs but not on the coral itself.The green in the pics is not what i am reffering to its the clear stuff thats tough to see but beleive me it is there-Kieth

 

[Kieth71]

Here is about the best picture i can get with my camera.It shows a bit closer up-Kieth

 

[Kieth71]

If it helps at all i used jelly like to explain the look of it not the consistancy.If i were to place my large monti coral over part of the rock the algae goes away.I have tried lights out for a few days at a time but it comes back.I am not sure what else to try and from the lack of responses i am guessing this isnt a common problem-Kieth

 

[Kieth71]

Well 86 looks and no responses...I guess i will go over all the things i have tried.I have added strong anion resin to my di mix to make a silica trap just in case i have a silica problem.I have kept my ph high bye dripping kalk at night and leaving the window open a crack.I have tried no water changes for a while as well.I have removed and rinsed the entire sandbed and only returned about 2 inches so i have a shallow sand bed now and make sure i siphon on every water change.I run gfo and change every 2 weeks.I will say that all the former were to combat dinoflagellates. Things look better in the tank except for this thin layer of clear algae that coats all the rocks and i have decided to try a 3 day black out and see if i cant rid myself of it once and for all.I have tried this before but it was before i had tried all the other things i had mentioned above.Any other suggestions would be great but i dont want to pull the entire tank apart although that has crossed my mind-Kieth

 

[jim.l]

Can't see from pics, but it sounds like a cyanobacteria. Try a chemiclean treatment to see if it kills it. If it does, you'll have to drop the phosphates and maybe nitrates in your tank. If you do the chemiclean follow the directions and be sure to have the required water change water prepared and aged. Make sure you remove carbon and turn off your skimmer. Syphon out what you can before treatment helps also.

 

[Kieth71]

My phosphates and nitrates both read 0 on my test kits although the phosphate reading could be case of the algae making it so.I dont have a heavy bio load and other then the time i tried to go a while without a water change to combat the dinos i am pretty good about changing it every 2 weeks.I also run gfo and carbon as well.I am always willing to try a suggestion but i hate the thought i pouring chemicals into my tank.Ty for the suggestion though and will give it some thought-Kieth

 

[Kieth71]

Here is a link to a thread that has a better picture of what i have..not sure i could draw any conclussions from the thread but at least a good pic-Kieth

http://www.reefcentral.com/forums/showthread.php?t=1666754&highlight=clear+film+on+rocks