Lawrosa;

Waterbear covered a lot of what I would have said. If an HEPD overdose was gonna be a problem, you'd already know.

Regarding tabs -- I forget to remind people -- because pools in my area tend to NOT have timers -- that with any sort of trichlor feed system (skimmer, feeder, what not) you need to run your pump at LEAST 2x per day. And, if you are using tabs to remove metals, you need to run 24/7 anyhow.

Tabs sitting in stagnant water can be a real problem.

But, back to the metals. As best I can tell, you've got three options:

#1 - You can use Pink Stuff or Metal Magnet regularly, until there's too much iron and you loose control. (With regular backwashing, this may not happen.)

#2 - You can pursue the "filter it out" approach, which requires a careful and attentive operator.

#3 - You can be a Culator guinea pig: http://www.culator.com/. Chem_Geek thinks this product might work. I've talked to them, and thought they might provide folks like you with free samples in exchange for public testing . . . but I haven't heard back from them.

Which one appeals to you?

Ben