First, start out with wood that some algae on it.
Secondly, you also need a lot of light.
Thirdly, and the most important rule I discovered, algae does not like to be moved. Once you have it growing, don't move the object it is growing on.
Fourthly, and VERY IMPORTANT TO ANYONE CONSIDERING USING ALGAE IN THEIR TANK, once algae starts growing, it will grow VERY QUICKLY. The algae will attach to glass, you can clean it off with a floating magnet. It will be back in 1-3 days, if you leave your lights on.
If you try loose floating algae it will get caught in your filters, so finding pieces that have algae on them already is best.
****Don't forget Algae does not like to be moved!!*** Even if you find pieces with algae on it, it will turn brown after being put in your tank. Leave it alone, it will come back.
Algae that has turned brown will take 2-4 weeks to start showing again.
Good Luck!! Follow