i have had no hitchhickers in my tank as of yet outside of bristleworms can i just manually remove these? but i find if your willing to spend some time eyeballing it will come out late at night as i find all my inverts (shrimp hermits sallly lightfoot and porcelin ) come out in the early hours of the night 1-3 am . i have also found they will chase a semi floating pellet.
Not much help im sure but might be worth a try before you tear down your rock struckture.
maybe try tying down some frozen food this is a FOWLR tank? so you wouldnt have any scavengers picking at it . and may draw the crab out into the open.
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72 Gallon Bowfront Reef.. Hardware:2x250w Luminex Elite HQI Reflectors (Phoenix Hexarc Bulbs), Galaxy 2x250w Electronic ballast, Euroreef 130 Skimmer, Sedra KSP 7000 Retern... Live Stock: Pair of Hawaiian Flame Wrasse, Leopard Wrasse, Pink Streaked Wrasse, Pair True Percula Clowns, Potters Angel, African Flameback Angel, Orange Fin Tomini Tang, Yellow Assessor, Tailspot Blenny, Purple Firefish..
45 G FW Asain Barb Community tank.
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