Bob, Consider just spot treatment as Cutrine is a good product but it is still copper based. You will no doubt need to treat the entire pond again in 6-8 weeks anyhow.A very small bottom diffused aerator might be in order. Look at something like a PA10W at Stoney Creek or Aquatic Eco Systems will have something this small also. You could get 600-700 GPM turn easily with a 1/20 HP motor 1 AMP (.7 CFM)I would however try to get a 9-10 inch rubber membrane diffuser vs the standard airstone. Ballpark price $300.00 with 50 ft weighted tubing.Good Luck PS This would push your bottom water instead of pulling your water thus more effective, This would also give your electric meter a rest from the 2 HP Kasco Just my 2 cents Ted
