[dukecola]

It sounds like you have a x-nitrate reactor, and the one with the red strips is likely an oxygen reactor or ozone reactor. Theil sold to Coralife, so perhaps they might have something.

I had quite a bit of the Theil stuff in the very early 90's, for sure he was the pioneer, along with Lamert Dehan (DAS). My favorite piece was the coil denitrator and I would love to find one. It worked awesome and kept nitrates at zero on my 200g reef.