<a href=showthread.php?s=&postid=7712479#post7712479 target=_blank>Originally posted</a> by mysis
If you are running a DSB you will have problems, and it normally is best not to add these fsih.
The eat the microfauna in the DSB and nitrates will increase and stay there until the sandbed goes or the goby goes, unless you have some other way of stopping the nitrates.