stain/residue on res

[ripken204]

i was moving some stuff a little in my case today and i shifted the res a little so now the water angles at a different level. anyways, there is a bluish stain on the sides of the res where the water was previously at. i have a blue dye. also my water is somewhat foggy.. do i need to change my water?

any suggestions on a good blue dye? also i dont really like my mcres. are there any new res's that are better than it?

also, as far as tubing goes, my clearflex has some pretty wide walls and doesnt like to bend well. what is the correct wall size that i should be using?

also, i am currently using plastic clamps, i would rather have metal clamps. any sepcial ones or are they all the same?

this is my dye:
http://www.petrastechshop.com/peg11coadb4o.html

i also have some pt-nuke in the loop