Very interesting posts. The store has tried salt, h2o2, and different algae killing chemicals. None of the previously mentioned things helped at all on the BBA. They put "flying fox" in a few of the tanks and they said it cut down on the BBA. That's hard to believe because the algae is pretty bad at this point. But, who knows what it was like before. The entire wall of tanks are on one system, so the possible cure would have to be ok for different kinds of fish. Also, when I tried to manually remove some of the BBA it was really really hard to get off. The entire input and output parts are totally covered in BBA, some of the ornaments, and in one tank even the gravel has some.
Hmm just watch out with the flying foxes, when i order them in half come in actual flying foxes (relatively usless, mean fish) and half True Siamese algae eaters. Its the SAE's you want, so make sure the black stripe goes through the back fin.
And when i first started working a couple years ago at the store i took over the fish departrment fish and the tanks were covered in different types of algae.
I had to look at the cause of each type and treat separately.
NEVER use algae remover chemicals, those things are just deadly, and i find do more harm than good.
If its green algae (water bound or stuck on things) i use phosphate removers, and lower the light period, reduce wattage, and up water changes.
Diatoms- i add otos to friendly tanks or young Chinese algae eaters if the tank is more aggressive.
Cleapatra (sp?) is the WORST!! (and not actually an algae) And the most common where i work sadly. It covers EVERYTHING but is so hard to remove, i take all the fish out, ornaments out, turn the lights off and just gravel syphon and clean the glass every other day. Nothing in freshwater aquariums seem to eat it. And normally i will just totally clean out and recycle those tanks effected.
And like i said with BBA honestly just keep at it, every day just scrape the walls and fish out all the stuff that comes off and floats around. I turn the filters off when i do this. And take out all the ornaments and plants.
But if it is REALLY Bad and you have a spare tank just rotate the fish around and fully clean one tank out at a time. It is time consuming but worth it. :P
I hope thats helpful as a super quick run through, algae issues have got to be the second most asked question i get and i've had a lot of experience with it, both fresh and saltwater wise. haha So those are the basic things that seem to work for each algae types.
But all tanks vary..