Roy just recommended a 2" abalone in another thread because it's too big for the mantis to eat. I tried hermit crabs thinking they would help cleanup until the mantis ate them, but they just shivered from fear in the corner until he ate them, not helping much with cleanup. Same with a smaller conch in the tank. I just added a larger queen conch that I'm optomistic about but we'll see!
A bit of clarification on the ab. They work well with a Neogonodactylus or other stomatopods under 3 inches, but if you put them in with a 4 inch+ O. scyllarus, you've probably provided stomatopod with a $30 lunch.
in retrospect... i'll probably just grow macroalgae and amphipods in this system.
do they stay in the sand? or do they skim the surface or jump/swim to the top? i plan on growing an amphipod mat (see http://www.ipsf.com/#anchor45957) that floats on the surface for pod breeding.
My 5" Os is in a tank with pods and grape caulerpa. She seldom kicks up sand anymore, there's about 3 - 4" in there. She has lots of rubble to move around and a PVC den. She doesn't STAY down on the sand, she swims around everywhere and walks around on the den and the rocks. This arrangement seems to work ok for her; there are A LOT of pods breeding and the caulerpa is mostly floating over the third of the tank that her PVC is in. Sounds like you'll have a similar set-up, good luck with it!!!
Off the subject a bit, since your talking about macroalgaes.... What kind of light do they require to grow?? I have a 50/50 light n there right now, My tank is getting setup for the mantis, since the previous ones were an unsuccess for some reason. If this one dies, I'll research it more intesively. Would a 50/50 do it? its a 20g tank, and the bulb is 18" long.
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