hi again all! i'm not sure if this is where i should post this question, or if it should be in tank set up, being that it is not a mechanical issue, i thought this would be best. i have a tank with 4 bobtail squids. i lost 3 in the past 36 hours due to bad water. i do alot of water changes (25% 5-7 times a week) with filtered water and have a pretty good filter/protien skimmer. so this morning i did a full water change and found that the problem is with my sand. it stunk, so i took the tank apart, scrubbed it with fresh water, and washed the sand. while i was sifting through the sand i found about 100 peices of shrimp. aparently the bobs aren't eating the heads and in some cases just killing the shrimp an burrying them. i use super fine powder like sand for the bobs to burrow in. what can i do about all these shrimp fragments? i would think that going in there every day and sifting through the sand would be very stressful to the bobs, and any filter that can pull shrimp parts out of the sand will also suck up the sand. i was thinking some sort of non-aggressive tankmate? something that would only eat the dead shrimp peices and not the live shrimp or my 2 baby pea sized bobs. something that would "dig" through the sand would be a plus, because the bobs seem to like to burry their uneaten peices. anyone have any ideas? your time and wisdom are much appreciated!