A Diamond Watchman Goby was one of the first fish I added to my tank after it cycled (actually a few months after). My tank is now 15 months running. I got to wondering if someone had a tank a year or better without stirring/siphoning the sand bed, would it be bad to add a sand sifter like a goby? I know it's not a good idea to stir the whole sand bed if it hasn't been done in a while and the reason I was wondering is my goby was all over sifting sand the first day. Could that cause a problem or would the goby not disturb enough at one time to cause a problem?
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