I have had a 35" Tall Hex tank for two years now. I've mostly had Danios in it, a Riukin Goldfish, a Electric Blue Crayfish, and a Gaurami. Currently, I have 6 Danios, 2 apple snails and 5 Sakura Red Fiery Shrimp. I have gravel at the bottom, live plants (Amazon Sword, Coffee and Grass), rocks, and Boa? Driftwood; a Penguin back Filter with B pads, one Undergravel filter, a Zoo Med 15W T8 bulb, a blue LED
night light, and a bubble wand light maker, and a heater. About a year ago, out of nowhere, a sudden algae bloom occured and it rapidly changed each day, visibly growing. It almost looks like mold and algae mixed. It grew everywhere, on my rocks, the inside of the acrylic, suffocating the plants, and any hardware inside. I thorouhgly cleaned it, but it just continues to happen. Currently, I'm undergoing another very rapid bloom., and it just makes the tank look plain-old dirty and nasty within a few mere days.
I use Seachem Flourish, Excel and Trace sparingly, though the Excel I use nearly every other day, if not every night. I have attached pictures below from Photobucket for illustration. I intend on getting Algae Eaters besides my Apple Snails, but I'd first like to address the issue if possible before thoroughly cleaning it spotless and adding new fish. Any suggestions of what fish to add to help prevent this would also be welcomed.
If you have any suggestions or idea on how to address this issue, I really appreciate your time and valued input.