Thanks folks. I guess sponge it is then. They're really fascinating when starting to grow. Pristine white at first. Now grey. I've got hundreds of them in high-flow areas. They're all over my sump, growing in my refugium, I've got a lot of life teeming around everywhere. Part and parcel with reef tank ownership. Great stuff!
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90G display tank. Kent Phos Reactor running carbon and ROWAPhos, Coralife 225 Skimmer, Typhoon 5 Stage RO/DI, 20 Gal Sump/Refugium with Chaeto/Caulerpa lit opposite daylight cycle. Coralife 2x150MH, 14K + 2x96W PC Actinics, Ecotech Vortech propeller pump, Hydor Koralia #2. |