i kept a mandarin in a 29g for about 7 months, but sold it due to it was appearing to lose a little color, and i figured I'd cash in on a mysis-eating mandarin as well as save my scooter. My scooter on the other hand died about a month ago after i had it for just under 2 years. I simply have A LOT of areas it can't get to in the back, its like a refuge for the pods, as well as i made little PVC pipes running through the back under the sand with pieces popping up into the rockwork for more breeding areas. I've thrown a few dragonets in the mix in my tank for one reason, when one dragonet eats frozen, the others follow, therefore i was trying to sell them after they accepted frozen and got a little bigger, unfortunately 2 scooters died when i tried this within a 4 day period (bad acclimation i assume, cant starve that fast) But you'll need to buy bottles of pods about... eh, its debatable, once every week or maybe 2 weeks, i did it about every month cuz i bought a ton at one time and they bred quite fast i assume. but thats what i did. im going to go for another dragonet soon, its just a matter of finding the perfect one. speaking of which, what is a northern dragonet? one was for sale at my LFS but it was gone... Im going to search for that now.