All 4 puffers are fat as can be and doing wonderfully! I lost 3 of the otos, I think due to bad stock (another thread on this). The ghost shrimp mow down any blackworms that the puffers dont eat and they're also helping to eat the algae wafer I put in for the oto. The puffers have already rid my tank of all but the 3 largest ramshorns. Really need to get some MTS for that tank and for my other sand tanks. They are completely ignoring the ghost shrimp, the last remaining oto, and the big ramshorns. I'm hoping that those 3 snails will breed in that tank so there are new snails coming in. I'm also monitoring the snail populations in my other tanks and moving smaller ramshorns over when I find them. No fighting as yet, but some eyeing up of each other. They seem to group up for feeding time, but retreat to their own sections of the tank other times and I find the same ones in the same areas, so I think they've picked their territories. I'm hoping the plants will fill in better by the time they've grown up enough to become really territorial.