I guess one reason is we can not see any crack or damage on these Stealth heaters. And we handle them much more roughly than glass heaters. 300W mixing with water.
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FOWLR - 65G with 30G sump
Singapore Angel, Copperband, Spotted Kole Tang, Blue Tang, Midas Blenny, Shrimp Goby and a pair of true/false Clown.
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