I cleared my 4 acre pond with 8 50lb bags of barn lime ($2.99/bag) from Tractor Supply. Spread it from the shore. Cleared up heavy red clay.

Consider trying the cheap simple approach, particularly with a small pond. Give it a few days, test it, and see if it is where you want it.

4 acre pond 32 ft deep within East Texas (Livingston) timber ranch. Filled (to the top of an almost finished dam) by Hurricane Harvey 9/17. Stocked with FHM, CNBG, RES 10/17. Added 35lbs RSC 3/18. 400 N LMB fingerlings 6/18