When i put the powder medication in it will foam up at the top and sit at the top. Is it supposed to do that? It says to keep aerating so i do but i believe its all the bubbles that is causing the medication to foam at the top. We only have 1 bubbles stone which is makes a wall of bubbles across the back end of the tank. I dont have the money to get a smaller one or i would im barly able to pay my rent as it is. what can i do or is it supposed to foam at the top?

I haven't used this myself before but you could try mixing it in water before adding it to the tank. Medication can cause oxygen depletion so I think that is why they are suggesting you aerate the tank a bit more. I would suggest that if your filters are set up properly so that plenty of surface agitation is being created, you will have plenty of oxygen being created. However, it doesn't hurt to use extra aeration so maybe put it at the opposite end of the tank. Apparently this medication will make your tank looks a bit of a mess while you are treating it so I shouldn't worry too much

since i started this hobby for foods, i barely used any med
in my fish keeping.... i could not imagine tasting my produce
with plenty of those stuff.

as always, pristine water and good feedings keeps the fishes healthy.