pretty sure the purple dye is fish safe, and in any case isn't likely to leach out of the glue.
S SumthinFishy , i suspect that the teflon tape would be to make it easier to unscrew and rescrew to joints. as you say, if the joint is over the water there's no real problem if a little leaks out. (same is true for sprinkler systems; you don't need to make the joints water-tight, you're just planning ahead for the inevitable repairs)
S SumthinFishy , i suspect that the teflon tape would be to make it easier to unscrew and rescrew to joints. as you say, if the joint is over the water there's no real problem if a little leaks out. (same is true for sprinkler systems; you don't need to make the joints water-tight, you're just planning ahead for the inevitable repairs)