i read tat do water changes often but tap only and no conditioner.
but do i have to add amquel and salt?
any tips on choosing a good one.how can u tell the difference between the sexes?
thanks guys.
hopefully my eel wouldnt mind it in the tank

depend wat kind of eel .. males look more round...no salt... it needs low ph acidic water...

A good way to select the discus is to check for overall roundnes and compare their eye size to the rest of the body. If their eyes seem larger then normal, it's probably an indication that it's been underfed or has experienced stunted growth. P.S. common sense would tell you to pick non sickly fishes like you would with all fishes.

Frequent water changes are because of stipulations that it'll help the discus grow larger, faster, produce more vibrant colors etc. They reside in amazon rivers that flow fairly regularly, so the idea is they experience pretty frequent "water changes" in the wild too.

Telling the difference between sexes is extremely difficult to both explain and master. There have been many suggested methods like shape of dorsal anal fins etc but nothing that you can really for 100% sure about. The best thing to do is purchase 10 or so and let them pair off, if they don't pair off from a group of 10 consider yourself a very unlucky man for getting 10 pieces of the same sex lol.

As for salt and amquel they are unnecessary additives for the water. Discus water is changed fairly often and to add these solutions and still maintain daily or biweekly or even weekly water changes is just unfeasible. You'd be throwing away your hard earned money that way. Salt has, and continues to be, associated with as a general cure all. That it soothes fishes etc and that it's just a good addition to the tank for any reason and all reasons. However, people don't realize salt has very little beneficial side effects and more ill side effects, although in both cases very minor. All salt really does is change the osmotic pressure in the aquarium tank, which would stress your fish because of "change" no matter what change it may be. ANd constant fluctuations in osmotic pressure via water changes and salt could cause ill side effects, albeit very minor ones. THe situations that i would encourage the use of salt though, would be when there are open wounds, or simple parasitical illnesses, like ich. Salt, in these situatoins, would encourage blood flow to the effected wound, and throughout the entire body, due to the shift in salinity in the water. And the basic organisms wouldn't be able to adapt to a change in salinity and simply stunt or implode.

Hope that helped.

thanks guys