• Welcome to TONMO, a community of cephalopod experts, hobbyists and enthusiasts. Established in 2000, we are the founders of TONMOCON, and birthplace of World Octopus Day and Cephalopod Awareness Days. ...You can register here, and Introduce Yourself. To rid yourself of ads and enjoy other perks, become a Supporter for just $50/year. (Now accepting bitcoin & other crytpo!) ...Follow us on Twitter and YouTube for more cephy goodness.
  • Looking to buy a cephalopod? Check out Tomh's Cephs Forum, and this post in particular shares important info about our policies as it relates to responsible ceph-keeping.

Tidal/Surge tank setup


Staff member
Sep 4, 2006
My best guess is, If it is much like glass, even with the gas holes, it is not likely to culture bacteria well. It would be interesting to see if it works the opposite and actually stays clean in a marine environment, something that would be welcomed for some FOWLER tanks but I am not sure what out-gassing tests could be made to be sure it was not poisoning the water.

Aug 13, 2009
Well if he ever gets some of this rock in stock before winter sets in over there in Colorado I'll definitely order some and see how well it sustains basic damsel fish. How could I test the water for toxic gases?

Latest Posts