I have had great success with the G. Tile in my brackish tank and was fortunate (and unfortunate) enough to see one of them holding eggs. They are great fish to keep and do BEST in close to full sea strength parameters. I had up to four and the most important thing for comfort for these guys are caves. And not just open spaces either, they like crevices over open dark places. This was the demise of my brackish tank. One died in decor of my tank and I did not know it until the rest of the fish died from the toxins from the deceased.
If you search my name, you'll see pics of my brackish tank with the eels... and even the death trap!
This summer I am going to set up the tank again, this time using lava rocks with crevices (NOT CAVES) and will try to get them to produce eggs again.
Better yet, look in my personal Gallery to see pics! MAN I miss that tank. Right now, it's filled with their feeders... brackish bred mollies.