RTR said:
The "biting" snails in question, as I noted earlier, were P. insularum, as opposed to the standard P. bridgesii/P. caniculata of the North American hobby. The largely reflexive delivery of a rasp to the hands of an aquarist (as I have personally observed with captive Ampullariids) is, especially with such very large P. insularum as those depicted here, tantamount to a bite.
Aquarist accounts of the allegedly predaceous nature of certain Pomacea spp. are not exactly comparable to the supposed benefits of iodide supplementation for freshwater crustacea for two main reasons - the former notion possesses empirical substantiation, and few overt ulterior motives for its promulgation amongst aquarists.
As to consistency, I never "absolutely categorically" rejected the potential utility of iodide, dismissed personal accounts to that effect as entirely falsified, or professed a belief that all aquarist accounts were valueless, and apologize if I gave that impression; however, I feel that, in the absense of concrete evidence (or even well-documented [externality-free and control-contrasted] personal experience), all such claims should be regarded with suspicion.
By the way, how much first-hand experience do you have with P. insularum, and Pomacea spp. in general?
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