CFC said:
The angel fish will grow too large for a 10g,minimum recomended size imo is 30g
Hmm... Angels are really large fishes with their long fins and they need at minimun 45-50cm high aquarium. How many 30gal tanks with 45-50cm high have you seen?
For angels, atleast 200 liters when the high of tanks should be atleast 45-50cm (like 100cm*40cm*50cm = 200 liters).
daz69 said:
No one can give any advice how many inches you can put into your tank, because fishes are different: some of them, like Angels don't swim alot than many other need alot of space, because they are good, fast swimmers. You should always study basic things about fishes you're going to buy.
1. adult size
2. need shoal?
3. bahaviour
4. how the fish fit in with others
5. water values
1-3 => tells you how large aquarium it needs.
Like very common clown loach (
Botia macracanthus ). When you look this popular site:
http
/www.loaches.com/species_pages/botia...cracanthus.html, you see how people keep them fishes in small tank. Some one tells:
"Love them loaches! I have six in a 40 gallon community tank."
Fishes adult size is over 30cm (>12") and usually grow little over 20cm in aquarium. It's a shoal fish too, so it's need friends

And writer tells that his/her tank is 40 gallons (in uk: 181 liters = 100cm*40cm*45cm tank, in us: 151 liters = ~100*40*40). 6 big fishes in that tank??
So, you cannot only look inches. Think about that if you have 2 clown loaches in your tank (its 24" and probably fit in 22" advise). Would those two fishes be happy in your tank?