I think I've read somewhere before that common plecos are very intolerant of salt in water. Although I have some fish (e.g. rainbows) which would probably benefit from some salt added to my tank, I'm afraid to add any because it would harm my pleco. I've had him for 7 or 8 yrs now and became very attached to my 18" monster. Can anybody comment on their experiences with plecos and salt in the water?