If you are going for all digital test kits for each of the parameters , it will be very very expensive.
I know a commercial digital meter for nitrate costs something like $3k.
And thats just nitrate alone.
But i believe the pH one is going for about $70 at most LFS.
Suggest you stick to normal chemical test kits , is still the cheapest.
Unless you have many many tanks running and have to constantly test the tanks for water parameters like in a shop or breeding environment , then getting digital units for all is not feasible to say the least [:]
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