The idea of overstocking your discus in tanks longer then 6 feet goes hand in hand with needing to perform water changes - discus are prone to parasites and infection to begin with and require above average water quality.
If your tank is under 6 feet long then generally you should go a bit more sparingly with how many you stock, but when you get into the 120 gallon + tanks you can really go all out with larger numbers.
I would never recommend anyone keep fewer then 6 discus in a tank and ideally 8+ with the exception of breeding pairs.
It's really all a matter of opinion, but I've dumped a lot of money into these fish through trial and error back when there wasn't a lot of information on the internet readily available - and I've found that unlike most CA/SA cichlids the more the merrier with these fish.
They very rarely get violent enough to kill eachother, inducing high numbers merely promotes a healthier environment all around, the dominate discus have more trouble setting up territories.
Similar to a tropheus tank.
If your tank is under 6 feet long then generally you should go a bit more sparingly with how many you stock, but when you get into the 120 gallon + tanks you can really go all out with larger numbers.
I would never recommend anyone keep fewer then 6 discus in a tank and ideally 8+ with the exception of breeding pairs.
It's really all a matter of opinion, but I've dumped a lot of money into these fish through trial and error back when there wasn't a lot of information on the internet readily available - and I've found that unlike most CA/SA cichlids the more the merrier with these fish.
They very rarely get violent enough to kill eachother, inducing high numbers merely promotes a healthier environment all around, the dominate discus have more trouble setting up territories.
Similar to a tropheus tank.