Ammonia / Nitrite are HIGHLY toxic and should be 0 if the tank is cycled.
While Nitrates of 80 aren't really going to harm anything other than the more sensitive fish it's not too much too worry about, but algae could be a problem. Water changes are the best way to keep your Nitrates down and maybe some live plants.
How old is the tank?
How big is the tank?
What's in there at the moment?
Well just keep up regular (weekly 20% - 30%) water changes and don't overfeed and you should be fine.
As a side note, the clown loaches and the silver sharks will BOTH grow too big for the tank and should both be in groups of 3 or more.
Depending on what the catfish are, they could be fine, but some (Corys for example) also need to be in groups and some (Common Plecs for example) get too big and messy for the tank which will be a real influence on the Nitrates. Any chance of a more specific ID or a photo?
Did I say mm? I meant cm!!! Tank is 3.5 feet across and 1ft 4in deep and the same high. Is this still too small for the sharks? to the untrained eye they seem to have alot of room to move around and they are full grown.
Did I say mm? I meant cm!!! Tank is 3.5 feet across and 1ft 4in deep and the same high. Is this still too small for the sharks? to the untrained eye they seem to have alot of room to move around and they are full grown.
Did you say mm? I read cm!![]()
Still too small, they need 75USG / 280 litres as a minimum.
Can you at least describe the catfish in more detail?
How high is high?
Do the catfish look like this:
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If so... they grow to be monsters and will also need to be rehomed.
or like this:
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If so you're in luck as they should max out around 4"-5".