Will these fish Fight???

Question

I have a 40 gallon tank. I want to put some of these fish in it, but I am not sure which ones will hurt the others:

3 Silver Dollars

3 Pearl or Dwarf Gouramis

4 Glass Catfish

3 Congo Tetras

2 Keyhole Cichlids

2 Bolivian Rams

1 Black Ghost Knifefish

which ones should I put into the tank???

Answer 1

I would put 6 silvar dollars,3 gouramis(1 pearl,2 dwarf),6 congos

Answer 2

All your choices are tank compatible, but the black ghost knifefish is going to get a foot long and take the same bottom space as the keyhole cichlids. That's the only one you need to consider, size not aggression being the issue.

Answer 3

well you can either have a community tank, with non-aggressive fish or an aggressive tank. cichlids are in the aggressive group and should not be kept with community fish. be careful if you are going to get angelfish or goldfish because some fish will nip their fins. when you go to buy the fish just ask the person who is helping you which fish will go well with another.

Answer 4

Okay, all those fish have different requirements so even if they don't fight, their mixed environment will stress them out.

No to the cichlids (rams included) unless they are all females because a male and female pair will terrorize the whole tank otherwise.

Tetras are a good way to go if you get them in a school of 6-8.

The Glass Catfish also need to be in a school plus they are fussy eaters who typically reject flakes or pellets so you would have to feed them frozen or live foods, which can get expensive.

The Black Ghost Knife will grow quite large so its not really suitable for your 40 gallon tank. Same thing goes for the Silver Dollars who happen to also thrive only in schools of 6-8.

Dwarf Gouramies, unless you get two females or a male/female pair will also fight and bicker among themselves plus the tetras may bite their long ventral fins if they mistake it for food.

Here's what I think would make for a pretty nice tank:

40 gallon tank

6-10 Congo Tetras

6-10 Tiger or Cherry Barbs

6-10 Zebra, Leopard, Gold or Silver Danios

Lots of live plants and a large piece of fake driftwood

Or you could do an all cichlid tank like the ones described in my link.

Or you could go really crazy and do a saltwater tank :D