I started my bbgobies in fw......and then increased the salinity with each weekly water change. Like OG said...don't try to mix the salt in the water that the fish are in....do that in a seperate bucket.
I keep my gobies at an sg of 1.004, I use redsea marine salt...no particular reason, it's just what they had at the store when I was looking....I add 2 teasp of the salt per 1 gallon of water for an sg of 1.004. I would start with 1/2 teasp and add that amount more to the mix each wc until you get it up to the right sg.
I have my gobies in a 5 gallon tank...each week I top off the tank with fw before I do the wc......syphon out 2gallons from the tank and have 2 gallons of mixed bw on hand to replace what I took out.
They need small caves of some type because that is what they will breed in. Ideally I would like some small clusters of barnicles, but am using whale eye shells atm...because I have plenty of those on hand for shelldwellers. The shells are easier to remove though when they use them for breeding..if you want to try and raise the fry. I have not yet had success in doing this, but...I havn't really made any serious attempts......when I get some vinegar eels I'll give it another go and see how I do.
Enjoy ! and...I think the bbgobies would be a better choice over the knight goby for the size tank that you have......nice as those knight gobies are, I think a 10 isn't quite enough room for them.
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