- How important is the quality of ro/di water used with the calcium checker? Is ro/di water testing 0 with any TDS pen good enough, or does it need it need to be pharmaceutical grade purified water?
- In the dilution step of the nitrate test, does the nitrate-nitrite-free artificial sea water need to be produced from the same salt mix as the aquarium water I'm testing?
- Is the HI761 Ultra Low Range Total Chlorine Checker based on the DPD (N, N-diethyl-p-phenylenediamine) method? Can it be used to test reef tank water, or only freshwater?
I need a DPD total chlorine test to check my tank water for residual oxidants such as bromite, bromate and hypobromous acid, which need to be lower than 0.02 mg/L.
Sorry this is full of technicalities, I tried emailing your aquarium specialist about the second question, as it was suggested in another thread, but I didn't get an answer.
