I've ordered a cheap kit from Walmart. The lack of weeds may be due to a water quality problem, but that seems unlikely, unless it's poison. The fish I have are healthy. I caught a fat green SF yesterday that has grown nicely since I planted it last spring. The problem is, there just aren't many fish, and the nature of the problem points towards otters as the cause. Last year at this time, the pond was teaming with fish.