actually i was comtemplating which one to buy when i was at ML yesterday... but decided against PBT because its more sensitive to poor water quality (heard from reefers). Since my tank is rather new ( close to 1 month after cycling), I went for a YT first... will go for a PBT in a few months time. Anyway the YT is doing very well.. feeding on the dried seaweed i put in...
Another point to take note PBT needs a lot of space to swim.. they can swim really fast.. so a large tank would be needed... some would even say that 4ft wouldnt be enuff.. but i think a 4ft would be the minimum...