GASPS IN HORROR
anyway, you might not even need a motor-powered filter for the 5.5g. the crabs' waste output may be sufficient to allow decor/gravel to hold the nitrifying bacteria. if you have a test kit, use it over the next few weeks, do water changes if the ammonia shows up.
anyway, you might not even need a motor-powered filter for the 5.5g. the crabs' waste output may be sufficient to allow decor/gravel to hold the nitrifying bacteria. if you have a test kit, use it over the next few weeks, do water changes if the ammonia shows up.