I was wondering how many SAEs to buy for my 48 gal and 15 gal tank.

In my 48 gallon I have 1 pleco, 2 bronze cats, 5 otos, 9 australian
rainbows, 3 butterfly goodieds.

In my 15 gallon I have 3 otos, 2 bronze cats and one beta.

Especially in my 15 gallon I need to get rid of some hair type algae.

Thanx