I have some used Tunzes. They work fine. I did inspect the shaft and the magnetic core. The shaft appears to be rusting. There seems to be some wear to one side of the core as well. Hydors I have had for 4 months(new) and the shafts are starting to corrode too but cores are not wearing. The wear problem is a design flaw in the Tunze. In Hydors the shaft is stablized on both ends and tunze only on one end(at least the ones I have) So my point is if the tunzes become unbalance wear quickly results. I had both on a wave maker and each time the tunzes started up it would make the worst noise. The hydor signifigantly less. Oh yes, the mounting bracket stubs on tunzes fracture very easily.
Last edited by fencer; 10-25-2007 at 04:39 PM.
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