Thanks for the info. folks, I did a Phosphate test and all appears ok the test was 0.1ppm so Iam fine.. I guess I should work on "NOT" using tap water. I have a terrible brown slimey alage attacking my tank. About the Banded shark, I should start feeding him right away, Huh ?? Should I try at night time when the lights are out. The other fish are hard to get around, with them eating the fish meant for the shark..lol