Tall Pine - I'm not sure what you mean by "4" in alkalinity?
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The desired total alkalinity level for most aquaculture species lies between 60-150 mg/L CaCO3, but no less than 20 mg/L.

What's your pH? if it doesn't need/shouldn't be raised then don't add AgLime or Pulverized lime, use gypsum.

I went thru a number of the same problems but my pH was hella off so I got that up from 5.1 to 7.0 pH then addressed alkalinity using gypsum.

For both pH and alkalinity there are formulas to take a majority of the "Guessing" out.

[Linked Image from i.ibb.co]

Here's a good overview of what and how on alkalinity.
Alkalinity-and-Hardness-in-Production-Ponds

Here's my thread here on doing the adjustments. I'm taking samples in a week or so to see where the pond is at prior to restocking.
What to Test For: Old/New strip mine pond



As for taking samples/getting the report - I bought a test kit and for the price of two samples from my three ponds it's already paid for itself.
[Linked Image from i.ibb.co]

Last edited by Stressless; 04/12/23 09:16 AM.
8 Ponds in Mid-East Ohio, three streams that merge to 1.

Fishbowl Pond - 1.5 acre, family swimming hole, 22'
Figure 8 Pond - 1.25 acre, 12'
Crescent Pond - 2 acre 11'