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We recommend the fitting of non return valves to the air hose to reduce the risk of water siphoning into the pump if power fails
25405S - Sponge Pad - (15Ppi) Blue Nautilus 2700Uvc / Aquis 2250/2450Uv (2Pk) 405S
depending on the amount used
Aluminum (min) 0
Whisper Quiet Operation
Coarse Aragonite 10lb Aqua Natural Hanna We recommend the fitting ofDescription Calcium carbonate derived from oolitic aragonite is biogenic (created by living organisms) and naturally re occurring. Protect the reef by using this superior and sustainable substrate. Bahamas sand is raw, naturally renewable oolitic aragonite sand that is up to 98% pure calcium carbonate. The grains are OOLITIC (egg shaped) and smooth. It is tasteless, odorless, dustless and sustainable. Combined with its near chemical purity, size