I use the API Master Test Kit plus the API KH
test kit. I plan to buy a total dissolved solids TDS
test pen and possibly a PH test pen. I am also considering a chlorine tester and possibly even an oxygen meter. I think the API Master Kit is all you really need. You can probably get GH
tested occasionally at a fish store.
I am not sure the API Master Test Kit is “most accurate”. That would be some kind of lab quality testing system. But I think the API kit is good for basic fish keeping. Lots of of people say test strips are not accurate. I used test strips and the API Master Test Kit simultaneously for a while and found them to be pretty close to each other. I cannot really say from personal knowledge that the Master Test Kit is more accurate but I believe those who say it is. Many test kits have GH
. I do not know how accurate they are. Knowing GH
can be important for some fish, snails and plants. But lots of fish keepers do just fine without ever knowing their GH
. Knowing KH
can be important for keeping PH stable.