Hello everybody
Actually i used to work at a petstore and thats where i fell in love with this hobby.
Major stores that aren't in it for the buck do their best to make friends with customers because the fish business is a poor job.
I know because i have many friends in the fish business.
Other stores just hire stupid people, also, so don't really blame the store itself.
Anyway, the upside down catfish that your friend has isn't a schooling fish.
Catfish of that type are of the syndontis family which come from africa.
When they are put in groups in a small tank with little to no hiding spaces they will fight amongst eachother.
The tank is also too small for that one catfish, they are known to reach sizes of 4-5 inches and might go after your other fish.
The tank is over populated in a short time, but don't let her learn the hard way.
Ofcourse it might seem gratifing at first, but if your a true fish lover, you should show her physically how to do it the right way.
You owe it to her fish.
Right now it might be ok with the fish she has in her tank right now, if you do water changes weekly, of about half the tank, the fish should be just fine.
I'm not too sure what kind of fish the engler you were talking about is.
If you could send a pic i would greatly appreciate it.
With bumble bee gobies, they are considered brackish water fish, but they can be acclimated to freshwater.
Knight gobies are also known to be brackish, but i myself had success with them in fresh.
When you buy a fish like that you should check with the store if they put salt into the tank.
If there is salt you can easily buy sodium chloride from the store, which is like the salt they put on the round, and put a teaspoon per 10 gallons in the tank and the fish will be just fine.
Only put the salt in once though, and a little during water changes.
Sorry for the ear full, but fish are my passion and i like to educate
If there are any other questions i'll be on this forum daily or you can e-mail me.
My e-mail is in my profile.
