Thats one of the more pricey ones i found.
Thats one of the more pricey ones i found.
Exactly the same, calcium carbonate (CaCO3).I have been adding crushed/dust eggshell, so not sure if that can produce the same result.
That is a good meter, but it is a "High range" meter and ideally you want a "Low range" meter.Hanna Instruments HI-991301 Water Resistant pH, Conductivity and TDS Meter, High Range....£639.96.
All lab. grade equipment is pretty pricey. There will be some cheaper ones that work OK.Thats one of the more pricey ones i found.
My next question would be is it possible to add too much calcium?, and what are the chances of actually raising other parameters just by dosing with it when needed. Would you need to throw a ton of it in there to see a difference?Hi all,
Exactly the same, calcium carbonate (CaCO3).
That is a good meter, but it is a "High range" meter and ideally you want a "Low range" meter.
All lab. grade equipment is pretty pricey. There will be some cheaper ones that work OK.
cheers Darrel
Not really, not for "hard water" plants, fish or shrimps. In <"natural situations"> a lot of water is <"fully saturated with calcium (Ca)"> from the dissolution of limestone (CaCO3). The derivation is a bit strange, but 7.14 mg / L (ppm) of Ca++ ions are "1 dGH".My next question would be is it possible to add too much calcium?
It is <"difficult to get more"> than about 125 mg/L (ppm) ~ 17 - 18 dGH calcium (Ca++) in solution, it just to do with the limits of <"calcium carbonate (CaCO3) solubility"> (about 315 mg / L).1 dH is "One degree German" and defined as 10 milligrams of calcium oxide (CaO) per litre of water. This is equivalent to 17.86 milligrams of calcium carbonate per litre of water, or 17.86 ppm.
Hi @JacereeI haven't had a chance to fully check its specification yet. I believe it's cheaper than the HI-98301.
Im going to look at them all before deciding. I try not to let the price dictate things usually, and consider how well something works first. I dont mind that the Primo pocket is not submersible.Hi @Jaceree
The Hanna HI-98301 at £77.16 inc. VAT would be my preferred choice. But, the Hanna Primo Pocket TDS Tester would save you approximately £20 if budget was tight. Both can be calibrated. For me, the decider is the fact that the Primo Pocket TDS Tester is not submersible. However, the HI-98301 has a watertight battery compartment. So, there you have it.
Hope this is useful to you.
JPC
Hi @MichaelJOne slight annoyance with this model is that the LCD is not lit.
My old eye would have accepted that trade-off...it would have significantly reduced the battery life.