I decided to post a thread on here because I need some advice and I've already exhausted all my fishkeeping books.
I have a very small tropical fish tank (at least small compared to most tanks.) The dimensions are roughly 18 x 8 x 10 inches. I know you're all going to tell me thats way too small and I should get a bigger tank :P but believe me it's the most successful aquarium I've ever kept and the fish are really healthy.
Anyway I've had this tank for around 3 years now and at the moment there are only two fish in the tank - a rather large angelfish which I've had for quite a few years, and a lovely little golden three-spot gourami which I bought more recently.
I've decided I'd like to buy some more fish for the tank (considering that over the course of time most of the original inhabitants have died.) I have a few ideas about the species I'd like to get but I need some advice.
To start with, the angelfish is quite large - his body may only be about 2.5 inches long but considering the shape of an angelfish, and the size of their fins, that takes up a lot of room in a densely planted tank.
Also he has been known to bully new additions to the tank, at least until they've settled in a bit, and I'm worried it might stress any new fish I buy.
here are some of the fish I'm considering getting:
bristlenose catfish (which I've kept before)
rams (which i've also kept previously)
red-tailed or redfin shark
So here are some questions.
Are rams compatible with angelfish or do you think the angelfish would attack them? Also is it essential to keep rams in pairs, and do they need companion tetras to feel safe? I'm pretty sure the angelfish would eat any tetras I added to the tank.
Another fish I'd like to get is a red-tailed Black Shark
or a red-fin shark, but I've read terrible things about their character and I'm afraid a shark might bother even my aggressive angelfish. would a shark be compatible with a gourami and an angelfish?
also...does the size of tank a fish is living in affect how large it grows?
In the past I've had a pair of pearl gouramis and although they were fine together at first, as they grew older they became so territorial I had to move one out of the tank. I'd like to get another gourami but I'm afraid the two would tear each other to shreds.
finally...I've sucessfully kept about 4-5 medium-sized (around 2.5 inch) fish in this tank and that more or less corresponds to the calculations I've done regarding surface area = inches of fish.
does anyone have any advice about compatibility and what are your experiences of angelfish, rams and sharks?