There seems to be a fair amount of conflicting information out there on internet regarding care and tank sizes for Discus.
Now, I am going by 2 different websites about Discus - Seriously Fish and Fishkeeping.co.uk.
Both have very similar information and I have used both of these sites for previous researches and seem to be knowledgable about a lot of aspect of fish keeping.
A basic breakdown of the general consensus for Discus care:
Minimum tank volumes - 255 to 260 litres / 67 to 69 US gals
Minimum tank size - 120 x 45 x 45 cm / 48 x 18 x 18 inches
Water temperature range - 26 to 32 C / 72 to 90 F
Water pH range - 5.0 to 7.0
Water Hardness : 0 to 5 dGH
These are recommended for a PAIR of breeding adults. (certainly not for 5 or 6 discus unless very young juveniles which will then need to be re-homed or transferred to a much larger tank would be required. IMO)
SeriouslyFish Quote -
"Many Discus fanatics choose to go down the heavily planted route which can be particularly beneficial to Symphysodon aequifasciatus due to the amount of cover afforded by such a setup. Discus are very shy, skittish fish and require as much cover as possible to feel comfortable."
And also, Discus are not for beginners and do need pristine water care. LOTS of water changes daily.
And lastly,
HHH said:
Well as for the water changes i really dont need too becuase since it is a planted tank (low tech) my nirates are always zero. So i can get away with the top offs
Hmm, I always would recommend having daily water changes, not just topping up water levels.
For several reasons, this helps to give a decent control over ammonia and water parameters regardless of what filter you have and how good you think it controls water parameters.
Ok, you might always get 0 readings for nitrates, means nothing really to me and low tech plants is beneficial for a tank but it all boils down to how you look after the tank water, and that means changing water on a daily basis to keep everything ticking over nicely, otherwise think you WILL have a breakdown in water parameters eventually and your stocking will suffer for that.
mrhidley said:
regardless you cant keep discus and IMHO you should do water changes regardless its for ammonia too
Providing he's got a well cycled filter, he won't have any ammonia...
That is true to an extent but doing water changes will also help to keep ammonia to a manageable levels for the bacteria otherwise may get a build up of ammonia in which case the filter may not be able to cope with a built up of ammonia and the end result would be damage and/or death to your stocking.
All of this are my ideas and opinions, since I am still a new fish keeper, I am in no way particularly experienced or knowledgable about fish keeping, however I do a fair amount of research and homework basically and just giving you my ideas based on my research on fairly dependable websites.
Not conclusive or nor should be regarded as such, fishkeeping is a ongoing learning process and even experts will differ in certain areas of fish keeping. A healthy debate should be a learning process for everyone involved.