heres what happend..,i got a tank of my uncle,he brought it round in his car only less than half full of water, the fish were at top of water like they were gulping, plus the water wasnt that clean,plus it had colured gravel in it, anyway i then placed the fish-one 4/5 inch red and white koi and one 4/5 inch very orange gold fish plus a one inch shubunkin in a pretty large round bowl whilst i cleaned the glass tank out which measures 45cms across the back, 35cms deep, and 30cms width, they are not yet in the glass tank as i am letting the water stand for a short while, anyway i have the fish in seperat bowls now as the big uns were floating on there side like nearly lifless, so i panniced and put them in there own little bowl wiyh fresh tap water and they mirraculosly are now looking very well indeed, plus the glass tank has a filteration system that you stick to the inside of the tank with a sponge inside of it, and the gravvel i washed with hot water 4 times and had abit of it in the bowl when the fish started being funny, the gravvel i am not putting back in the glass tank as it is still dis-colouring the water, i have not kept fish for along time but would really like to do so again and any help would be very greatfull indeed,thankyou.