It depends on what fish you have in the tank!
Because when a Algae Eater becomes fully grown it likes to eat the slime coat off the other fish. ( NOT all Algae eaters though) for example the Chinese Algae Eater WILL eat the slime coat off the other fish when it is fully grown.
It depends on what you are calling an "algae eater." A pleco is considered a scaleless fish. A Siamese or Chinese algae eater does have scales.
No.
Yes
Yes, I have had lots of experience with Oscars. One of mine died recently from a sickness. Algae eater fish are not dominant, in this case the Oscar does not take it as a threat and does not bother it. The answer to your question is yes, an Oscar can live with an algae eater fish.
If you have an algae eater and no algae you can go to any pet shop and get algae waffers.
It is probably getting into fights with some of the other fish in the tank.
a shark
yes algae eaters do eat dead fish because as i type this my algae eater is feasting on a dead goldfish!
no they cant
An algae eating species of any type isn't capable of eating all the algae in the tank. Your going to have to clean the tank yourself. The algae eater will from then on keep the algae levels in your tank down, but not totally.
I may be able to answer if you define "allergy eater".ANS2:Algae eater, maybe? Sure, they won't bother mollies.