Cannabis Cultivation: Food Web nutrient generation. Over 2500 PPM!

Today I've decided to try and solve the mystery of why my natural deep water system is putting out such high PPM using my bluelab Truncheon meter. I kinda gloss over the specifics in the video so I'll put them here.

Water used to fill the aquarium comes out at 250 ppm (+/- 2%) at a pH of 9.5.

The 4'x4'x7" flood table holds 25 gallons of water in addition to roughly 4 cubic feet of mixed substrate.

The aquarium substrate consists of multiple layered constituents, low quantity high variety. Happy Frog, Ocean Forest, Michigan Made Mix, Great Lakes Water Only, Hydroton, Aquarium Sand, Aquarium Pebbles and lastly my own secret recipe compost mix.

I also added 3 cups of dolomite limestone and 2 tbsp of each of the following to feed the microbes, algae , shrimp, snails, and fish: Sulfured High Brix Molasses, Blood Meal, Bone Meal, Seabird Guano, Bat Guano, Insect Frass, (High Phosphorous), Kelp Meal, Alfalfa Meal, Neem Seed Meal, Azomite, Langbeinite, Michigan Glacial Rock Dust, and 1 milliliter of Great White, Orca, King Crab, Mammoth P, Superthrive, Max Microbe, few other microbial / fungal inoculate, as well as a local sample of microbes taken from a rice grain culture I placed at the base of an oak outside my house.

Its been almost 2 months and the PPM is always over 1800/2500 (500 TDS / 700 TDS) at 8.5 pH, ambient air temps are at 78f and aquatic temps are at 72f atmospheric CO2 is enriched to 900 ppm and its under 720 watts of 4000k LED lighting (ION 720). I need naturally stabilize it at about 7.0 pH and 1,000 ppm ideally so that my cherry shrimp and other crustaceans don't have issues anymore. Any insight is much appreciated.

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