Originally Posted by KantGetRite
I'm just beginning my research for a marine tank but why so few fish in a 20g? And do you have any alternatives to the goby? I don't like them really
fish are much more territorial than fw
fish, they also put more bioload on a system. Having a large number of fish will easily crash your system as the bb in the rocks will not be able to put up with the output of the fish. Having a skimmer/refugium helps to filter these and is usually the only filtration used in sw
tanks other than live rock and sand. Saltwater fish also cannot tolerate changes in water quality the way freshwater fish can, the ocean doesn't really change much. An alternative to gobies would be a blenny or maybe a basslett.