How many sand sifters to a tank?

[my2rotties]

I was concerned that they might compete for food, or two gobys would knock down at sand critters too quickly. I decided not to go with the pair of gobys today since they were a little too small to be safe from my puffer. Thanks for the info...

Originally Posted by naesco

These fish are eating the critters living in your sand bed.
Your tank is large enough to accommodate more and you can also drop in shrimp pellets for them to eat as well