Reply With Quotefrom my limited knowledge
it has no phosphates , thus it should not screw your readings []
Hi,
Will dosing with Ca(NO3)2 daily affects the kH reading and thus affetcs my CO2 reading?
Thanks.
from my limited knowledge
it has no phosphates , thus it should not screw your readings [
I doubt so. It don't have carbonate/bicarbonate content, which what KH shows.
Wan, NatureTan is right but it will increase your gH. Ca(NO3)2.4H2O is hydroscopic.
This will not do any thing to the KH, only the GH.
If there is no (CO3) in the chemical formula, generally its safe bet it will not alter the KH. Salt water has a Borate component that contributes to alkalinity, but it's not as important as the CO3/HCO3 system.
A few other things can effect KH but generally if you do regular water changes, these would not do anything.
Regards,
Tom Barr
Tom Barr, may I know what are they?----------------
On 7/30/2003 10:41:17 AM
A few other things can effect KH but generally if you do regular water changes, these would not do anything.
----------------
Dolomite, limestones, Cockle shells etc....
I'm looking for a convenience source for dolomite to replace coral. I understand it provides 1:1 Ca and Mg and it leaches slowly. Seem like a better alternative compared to Coral.
Isn't dolomite the same as putting coral onto your substrate instead of filter, and let it leach out very slowly into the water column?
Yes, the same but can also place them in the filter sump. But dolomite leaches slower and provides a 50:50 Ca and Mg ratio. Juggler once give me the chemical formula for Dolomite but couldn't find it now. Hence, less water change.
Does it provide KH too? Something I like about coral is I don't have to dose baking soda. Well, if it does, I'll have to consider that if cheap. Just don't really like the sodium content in it.
Another thing, the recommended ratio for Ca:Mg is 4:1. So if it's 1:1, you think it's going to be OK? In fact, I've talked to Dr. Mallick about dolomite CaCO3 which Tom Barr suggested month ago. I think it's a good one, since it provide Ca & KH. He's still working on it. Yet to hear from him yet.
Yes, it does. 1:1 ratio is one of my first concern. There is some validity about the 4:1 ratio as I personally experienced it but others seem to do fine against those ratio. There are certainly some people out there who have tried dolomite with success too. I will never know if I don't try and I guess that is how I want to learn.
Dolomite is CaMg(CO3)2.
I agree with you. I've tried Ca higher than the ratio, not really a concern. But yet to try Mg that high... where to buy?
Tan, Mg > Ca is a problem not Ca > Mg. Mg comes from MgSO4.7H2O, Dr M too. Alternatively, espom salt from supermart.
I already have MgSO4. I'm refering to dolomite. Where can I get? If you know...
I am looking for it too. Will let you know when I find it, you do the same too.
you can get dolomite from argicultural supplies.
unfortunately, argicultural activities in singapore is minimal.
nearest place to get would be malaysia but it will come in 50kg.
thomas liew
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