Hey guys - new to this forum.
I've got 3 Dragon gobies, right now home in a 10gal fw tank - they're young, about 5 inches each just recently got them from a local petsmart.
I'm moving into an apartment soon, (few weeks) and will then be getting a 55gal for them, and starting to raise the salinity. (They were adapted I guess to pure FW since the fish store doesn't know much about them.)
Anyone have any ideas about where specific gravity levels/salt levels they like best, or nitrate levels work best for them? Jw.
Hi and welcome aboard, Daeorn.:wave:
IMO, your tank is far too small. They'll need more than 75 gallons if you want to keep all three of them. Have a read with this link.
I'm glad to see you are on the right track, They are indeed a brackish water fish.
I have two in my 55, which is only slightly brackish (1.001-1.002 sg). The are doing great, and have grown at least an inch in length since I put them in there several months ago. Nitrates in my tank are usually really low, 10ppm or so. They seem to enjoy shrimp pellets, I use Top Fin and have heard they enjoy Wardley's as well. They seem to be pretty blind, so I feed them with a tube to make sure the pellets land right next to them, and to give them some time before everything else in the tank goes after the food. Make sure you give them plenty of hiding places, as they are territorial. I have a length of 4" pvc and four 5-8" pieces of slate resting against the glass to make caves for them. Put at least one more hiding spot than you have gobies, and they should be happy. They're neat fish, and fun to watch.
Sweet looking fish. Getting up to 12 inches or better is gonna require a lot of hiding places. They don't seem to be a really messy fish for their size so maybe a 55 will meet their reuiqrements for stability but providing enough hiding places for them and allowing them to feel "comfortable" may be a daunting task. A longer 55 might make things a little easier, I think they go to 60 inches and are still tall enough to have a few species in the water column.
I would guess that nitrates up to 20ppm are ok, anything higher needs to be controlled. I keep mine at 15-20ppm for my plants and my fish have never shown signs of stress from it. They are also in a no salt tank so a brackish tank will be even safer. Doesn't mean to ignor them but will protect the fish from the nitrates better.
I am curious, what type of substrate do you plan to use? Might be a good idea to get some sand as it seems they like to play in sand and it would let them dig their own little security caves under anything you put in there.
Mine seemed to like hermit crabs soaked in water *extensively* Give them some caves too, once they're in their good home.
They can get up to a foot or longer, so I'd suggest you get a much bigger tank, such as over 75 gallons...
I've heard that brackish water should be aroud 1.005-1.015 salinity, so I'd got withh around 1.010 just to be safe :)
From my reading on these guys, I have found that salinity is not critical, so long as it's there - say 1.003 to full marine. The really critical thing for violet gobies is a fine sand substrate, as they will filter the sand for food. They also have remarkably small throats for the size of their mouths - they can be kept with bumblebee gobies - so their food needs to be chopped fine.
I would keep no more than 1 in a 55, for 3 you should probably get a 120 (4x2x2) to 125 (6x1.5x1.5), though a 75 would probably do in a pinch.
they are indeed brackish, but the largest one in Captivity is kept in freshwater at 18"
From what I could find on them, they naturally live in river banks. So muddy substrate. So sand would be good. Mine likes the algae wafers, but then i've not really tried too much else. Is difficult to feed him in a community tank, as he's nocturnal.
Ours came from a fw tank at the shop, which again, didnt know a lot about him. Though they were right when they said he wouldnt bother the other fish. They thought he would only be terretorial towards other dragon gobies.
Wasn't my first choice.. looks kinda scary with those little yellow eyes and little spikey teeth. My husband wanted him, and has named him wiggles. He's about 6" at the mo in a 22g. Lovely character.
I dont think the salt content is crucial, though it probably helps to bring out the colour.
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