Woah. Don't mean to get in the middle here but I think that manual removal by way of veggie baiting is always the best option...just my opinion...carry on...
:iagree:Bio-load aside, I personally don't think a 33gal is enough room to swim for a school of these fish. I had 3 kubotai in a 29 for almost a year. It was my first experience with loaches and i didn't know better. They are obviously stunted and the others have outgrown them in the 75gal where they now live. I'd say a 4ft tank, preferably a 75 or 90 with the 18in width, would be the best choice for a healthy home.