ok.. need some expertise, experience.
we struggling with the 75gallon. for ages it been running fine and now suddenly, constant battle with amonia.
doing water changes, weekly, about 1/3rd. i removed all the plastic plants for a while, with no difference, so put them back in, fish didnt like not having them.
has a gravel bed, about an inch thick on average.
we lost 2 fish, due to ick, caused im sure by the high amonia levels. seem to have got rid of the ick, with some salt and little medication, but did loose 2 of the larger tinfoils. now just one large tinfoil, one medium, who still a little sick, and 2 bala sharks who didnt seem bothered by it all.
the tank probably was over crowded. didnt expect the tinfoils to grow as quick as they did. balas still only about 4 inches, so got some growing yet.
currently, have 2 filters, a large and a small whisper HOB
. with a bio mat, i guess it is. these seem to do ok, but now seem to be unable to cope.
im not sure if i should change them to bio wheel filters, which i always had luck with, or set up a wet/dry filter. i have a spare one, from my marine tank, no longer being used. just bioballs in it. pump needs a new impeller but other than that, works. i was going to modify the small HOB
filter, tapping into it so it drains down into the wet/dry, then use the pump to pump back up. would be pretty low flow, as i know the balas dont like a lot of current.
not sure how well it would do on a fresh water tank though? any ideas? are they as effective on FW
. i know bio balls are a topic of mixed opinion. these are trickle over, not submerged.
or get a couple bio wheel filters? i just limited with space on the back, due to it being back to back with another tank, cant fit two full size filters on the back.
any suggestions? i dont want to loose my balas, but i dont know what else to try.. dont seem to be able to win.. its 75gallon, and although probably maxed out, with only 4 fish left, not yet fully grown, id expect it to cope.. i will have to get another tank for the balas when they get bigger i know but i figure i got a while on them..