Will an algae eater clean up the stubborn brown algae accumulating on the glass of my aquarium?

You dont have the space for any algae eater that wont be killed by the cichlids. Large common plecos can usually survive with them, but they get too big for that tank. Small species will probably be killed.

Ian

People have used Seachem Flourish Excel to deal with that type of algae. No, you would need a lot of algae eaters to eat up brown algae. Most algae eaters don't eat that type of algae.

No fish will be suitable with te fish you already have, but just like mentions sechem florish excel works great for brown alge , you will have more luck buying it from amazon because I've looked for it At all my fish stores no one has it! Dose everyday the amout suitable for your tank, good luck!