Hello,Just watched your video. It requires only liquid reagents for testing and recommends API test kits as used in that video. No longer a fan as we all know API big 3 kits are awful and not accurate or constant.
You can use any combination of the below
Salifert KH/Alkalinity Pro
RedSea KH/Alkalinity Pro, Magnesium Pro, Calcium, Phosphate Pro
Giesmann Aquaristic Magnesium Professional, Phosphate
Tropic Marin NO2/NO3 Pro
API Calcium, Alkalinity, Phosphate, Nitrate Tests
Happy Reefing!