As there is no star I am giving it one. I've had almost every good PH on the market. In fact, I still have two Tunze PHs that I've been using for 13 years with no problems. I ordered one of these complete with an MP10 for a 45g drilled cube that I built. Tunze no longer uses a good magnet. performance, you need to buy a "magnet extension". Looking at this image this is a distortion as the magnets appear to be the same size when they are not. The box shows the same as on this page: http://www.tunze.com/fileadmin/images/product_database/ 6025.000.jpg Misleading.
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