CONS: Purchased for 9.5 gallon Fluval FLEX. It looks like it CAN fit vertically but it is NOT FULLY SUBMERSIBLE so you will need to keep the waterline well below the black dots obscuring the waterline on this tank in order to use the product properly. The purpose of FLEX is to look inside your aquarium without seeing any equipment or piping. The Fluval FLEX 9.5 gallon box recommends this heater and it really doesn't match the aesthetics of this aquarium. PROS: Looks like it will work. better on other tanks. For example if you have the lid up or the waterline is a few inches below the top of the tank. Glitter can look great in a traditional tank and it looks like it comes with a 3 year guarantee.
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