The 9 watt internal UV steriliser from Mr. Aqua is a neat idea, there are very few small internal UV steriliser on the aquarium market these days. However, one drawback to having an internal US steriliser is that the size of the unit must be considerably smaller, as well as the bulb. Unfortunately, unless this 9 watt device is being used on a 10-20 gallon tank, it will do a decent job of killing bacteria and algae spores but your ich and crypt koodies will not be significantly affected. Furthermore, we hope that the included water pump is of the adjustable kind so that the kill-time can be fine tuned to target the desired organims: If the flow is too slow the UV will not sterilize faster than the rate of reproduction and if the flow is too fast, well your koodies will just pull out some sunshades and sunblock and thank you for the rays. If nothing else, this 9 watter from Mr. Aqua is a perfect quarantine tank accessory. There also exists 18 and 35 watt versions of the Mr. Aqua internal UV sterilizer but those units are also a good bit larger. Marine Depot will help you start irradiating your bugs for $75.
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