07-28-2010, 04:46 PM
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you can carefully remove them without popping them then you can get them out. if you pop it ( which an emerald crab will ) it will release its spores inside and more will turn up around your tank. carefully remove the ones you can, which is why its best to remove the rock they are on first.
@johnny, i would never personally add something for them to do a "job." for example, if i had a mouse problem i wouldnt buy cats, then dogs...to me this is just like buying 10 arrow crabs for a bristle worm problem or 6 peppermint shrimp for aptasia. you dont need a problem to fix a problem. a big contributing factor to everything is prob. overfeeding. if alot of algae is present, even though you may or may not have much of a nitrate and/or phosphate reading in your test it may be a false reading. the algae ( usually this is common with tanks full of green hair algae ) is using up the nitrate/phosphates in the water so testing shows low ammounts when really higher ammounts are/were present.
i personally also find crabs, including and esp. hermits to be a pest in my tanks. the hermits love taking snails from their shells only to find out they dont want that shell so they move on to the next one, thats even with having empty shells in the tank in my experience. emeralds you never know and once theyre in, good luck getting them out. even coral banded shrimp, which i know it says shrimp but to me acts more like a crab/lobster and will shred whatever it feels like. i find it seems anything the crabs can get ahold of they will. guess thats my personal preference with crabs though, i know some people love hermits.
i suggest taking another look at what you have at the minute, like ( but not limited to ) your feeding schedule,types of foods used, lighting schedule, old/new bulbs, your source water ( and i would test that ) how heavily stocked the tank is, your filtration/water change habbits, and so on
Last edited by onefish2fish; 07-28-2010 at 04:51 PM..