I have the Tunzes 6100 / 7095 Controller. Love the ability to manipulate currents. Well built, bulky, pricey, and can be a little unsightly installed in your aquarium for the first time. These pumps do require a good cleaning about once every two months due to precipitation of calcium on the drive units. I think this exacerbated due to the use of Kalkwasser through my top-off unit. Again....this is only my feedback and not gospel. Hope this helps ya.
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240G
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