Sponges Sponges filter massive amounts of water every day, feeding on the microplankton. Many will develop calcium, silica or sponging structures to support their shape. Sponges need to be anchored in rockwork; they do not tolerate sandy anchoring substrates.
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representative. Not valid in combination with any other offers; 15% OFF merchandise total only. Excludes Gift Certificates. Hurry!
Offer ends Monday, Nov 30, 2015 @ 11:59 pm, CST.