ACFs with Tetras

[artes]

Hello! I have two ACF frogs that I just moved to a 20 gallon, and they're hanging out with 5 black skirted tetras to help the tank cycle (I used 10 gallons of precycled water, and their original rocks, but I wanted to make sure it cycled right). The guy at the pet store told me that the tetras could stay with the frogs, because even at full size the tetras are too big for them to eat. Is that actually true? The frogs are only half grown now, so currently they're definitely too small to eat them.

Thanks for the help.

[Wormwood]

They will still nip at the fish fins (even if they can't ingest the entire fish) and cause them stress, which can lead to death with fish pretty easily.

[artes]

Ok, thanks. I'll move them out after the tank is finished cycling. I don't want to stress them to death.

[rodsboys]

How big is "half grown"? I don't think there is a tetra that can co-exist with ACF. They will become food. ACF's can fit huge items into their mouths/guts.
There is no such thing as "cycled water" either. You just moved over some "used water". If you would like to shorten the cycle you should transfer over a portion of your filter media to the new tank.
If your frogs are tiny still and not "half grown" then you may still be fine. However if you had an old setup for the frogs that was cycled you should perhaps keep them in it until the new set up is cycled.

[artes]

Their body is roughly 2.5-3 inches long, which is why I said "half". They've been living with the tetras for about a month now and haven't even paid attention to them, I was more asking about what they would do as adults.
Unfortunately, due to the way my electrical outlets are set up, I couldn't move over the old filter, and the new filter is a completely different type. I suppose I could drop the sponge from the old filter into the water, but I figured that would be silly.
Due to space availability, the new tank went exactly where the old tank was. So, if I left them in the old tank, they would have been sitting on the floor, where my cats sure would have enjoyed watching them. Some of the cycling media is also in the old substrate, which was moved over as well.

[rodsboys]

Sounds like you are doing the best you can with your situation. What kind of tetras do you have that they are too big for a 2"-3" frog? Buenos Aires?
You can add a couple of hardy cheap live plants to the new tank to help with the cycle too. Plants are fresh water's answer to live rock.