For those wanting it, Home Depot no longer stocks it, but you can get it from Home Hardware, their house brand called Weather Shield Silicone Caulking. White tube, teal lettering 'Safe for Aquariums' in big letters on the tube! 
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Fluval Osaka 41g sumpless tank, 250w MH + 130W PC , DIY HOB refugium, Tunze 9002, Koralia 2, Koralia Nano
Toad Stool
Colt Coral
Purple Shrooms
Red Shrooms
Candy Cane Coral
Hammer Coral
Moon Coral
Copper Banded Shrimp..and growing
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