I use 4 0z per gallon of Glyphosate and label says surfactant already added. What is 80/20 surfactant? Spray entire pond at one time and never had fish kill? How many oz per gallon you using? Have a moss problem also...comes to the surface as it gets hot and sinks in cooler weather. Should I be using 10-10-10 fertlizer to control moss? Pond dye has not helped and have put many gallons in over the years. Put 25 grass carp in few years ago....wasted money. I have bought many gallons of Glyphosate over the years and at $40 per jug getting expensive. Spray about 30-36 gallons each time at 4 oz, per gallon .
