Clownfish on side at surface

[James CNM]

Well.. it's spot on when calibrating with both RO water, and PinPoint 1.026/SG 35 Calibration Fluid. So there's that...

I'm not tossing this tool around, it's just me doing the salinity test. when i received this unit, I used both RO water and Pinpoint Calibration Fluid to test it. i now normally recalibrate every 2 weeks (or see if its still calibrated.. because i have not had to play with the calibration knob.. ever.

if you were to come to my house, you'd see that i don't skimp.

No disrespect my friend. Was just throwing a little knowledge your way. RO or a bottle of mineral water, any distilled water. Float it in your tank/sump so it reaches your tank temp. Then zero out(calibrate) the refractometer. Regardless if it says atc.

 

[James CNM]

What reason do you have to believe that the PinPoint solution is "spot on"

I hope that it is, and I'm glad it's working for you, but please know it's entirely possible that the "store bought stuff" is "off". just something to keep in mind

Best of luck!

More a gimmick

 

[Blue-eyed Clowns]

Just to clarify one point - while nitrite testing is a good indication that a nitrogen cycle is mostly complete, nitrite itself, at the levels found in marine aquariums, is not harmful to the fish. It IS deadly to freshwater fish though....

Good catch, Jay, and thanks for clarifying. You're right that nitrite at the levels we see in saltwater isn't really a threat to the fish. I only meant it as a check on where the cycle is. Ammonia is the one to keep an eye on here.

Mike / Blue-Eyed Clowns