The little white balls im guessing are the aluminum based phosphate removerand I have heard of it causing issues but havnt even attempted to use it myself. I suggest buying gfo, its cheap it works and if you have a fuge a little extra iron is a good thing, also there are only two company's that import gfo into the U.S. so its one product you should buy based on price. If you have algae, you have phosphate, there is no physical way it can grow without it, its impossible. Problem algae = a problem with phosphate. Phosphate issues = lots of pretty white sticks or sometimes you might get "lucky" and just have no growth and pretty brown sticks. This hobby is about water, water, water, and did I mention water?? Flow, lights, feeding, it all comes after nutrients and chemistry. Take care of your water and the corals can take care of themselves. Good luck I hope you have a better experience this time around.