My pond is just at 1 ac/ft. I put in 500# about 8 weeks ago. Will probably add another 500# this fall. I dont think you can put too much. Just make sure its ag lime and not hydrated lime. I initially went to my local feed store for it, they said at first it was ag lime, turned out it was hydrated. Tractor Supply carries 50# sacks if you cant find anyone who can deliver a truck load. My understanding is most truck deliveries typically require a minimum quantity which may be much more than you need or want to put in.

.10 surface acre pond, 10.5 foot deep. SW LA. The epitome of a mutt pond. BG, LMB, GSF, RES, BH, Warmouth, Longear Sunfish, Gambusia,Mud Minnows, Crappie, and now shiners!!...I subscribe!!