I have two of them currently. My larger one is a few months and survived a complete cycle. Although it's not recommended, these fish can be very hardy. If you put them in sand, they will dig. They will kill your filters if they are in a shallow tank with sand. I get best results feeding them brine shrimp. The newer goby hides more and filter feeds. The older goby has gotten used to sifting through the sand for food. My older one is also completely indifferent to light vs dark. The younger one seems to be more active at night. I feed mine shrimp pellets, bloodworms, glassworms and mosquito larvae mostly. Occasionally I will also throw in some tetracolor granules (only the older one eats these, but he stops after he realizes that they aren't real food). I will occasionally break up an algae wafer and throw that in too. When I was trying to fix a nitrite problem in my tank, I cut down on feeding and they started to eat some of the algae off of the glass. It sure looked akward.
Only warnings are, make sure you keep one, or keep them together. If you put one that was solitary for a while with others he/she will get very territorial. My oldest one used to kind of open his mouth like a POed lizard and show off his teeth when others got too close. Then he started biting them. Now he is used to them though.
Also, make sure if you put them in gravel that you feed them live brine shrimp weekly. It's hard for them to pick out food from between gravel. When mine was in gravel he used to filter feed the brine shrimp and he would get very little of whatever sinking foods went into the tank. In sand they can just scoop in sand and food and the sand will come out of their gills.
Personally, I love my dragon gobys. They can have a lot of character. I find mine more active when alone than together. My oldest one is about 8" and my younger one is 6".
Only warnings are, make sure you keep one, or keep them together. If you put one that was solitary for a while with others he/she will get very territorial. My oldest one used to kind of open his mouth like a POed lizard and show off his teeth when others got too close. Then he started biting them. Now he is used to them though.
Also, make sure if you put them in gravel that you feed them live brine shrimp weekly. It's hard for them to pick out food from between gravel. When mine was in gravel he used to filter feed the brine shrimp and he would get very little of whatever sinking foods went into the tank. In sand they can just scoop in sand and food and the sand will come out of their gills.
Personally, I love my dragon gobys. They can have a lot of character. I find mine more active when alone than together. My oldest one is about 8" and my younger one is 6".