Help me with this algae!?

[denwhite16]

So In the past couple months my tank has become overrun with algae...I used a hose a few weeks ago to suck up as much as I could. Well it's back...

I just got a new LED light for my tank, switching over from my OLD (2yrs) fluorescent bulb. Could the old bulb have been helping the algae to grow?

Also my LFS gave me a block and told me to drop it in and it will get rid of the algae...I think he said it was Copper Sulfite? I wanted to get the opinion of AA before putting it in. I was also concerned that it may harm my African Red Knob Star that you can see in one of the pictures.

Thanks in advance for any help on this issue!

 

[Sergie]

What kind of water are you using? What's your stock, tank size and parameters? I would avoid dropping that in there. There are a lot of more useful ways to help control algae.

 

[denwhite16]

Originally 1 1/2 years ago, I filled with tap water. (Big Mistake, I've since learned)
I purchased an RO/DI unit last April, and have using that ever since.

I have two Clowns, a scott java damsel, and the starfish. 75 gallon tank.

PH-8.2 Ammonia-0ppm Nitrite-0ppm Nitrate-20ppm

I called my LFS and the guy said that it is a pond block... :-/

 

[Sergie]

Have you tested for phosphates? It couldve been your bulbs though. I would try a black out for a couple of days until that algae is gone. Those LEDs look good though.

 

[spoonman]

I would invest in a CUC. Some snails and crabs will help. Also cut back on feeding. Algae feeds on excess nutrients in the tank.

 

[denwhite16]

I will try that...I did have a CUC but most of them have since past on to the afterlife. I'm not sure how many I have left living. Would old shells cause the algae as well?

I has a phosphate kit, I will test it when I get back home from work.

Thanks guys!