спорные пропорции Ca:Mg

Модератор: Aquathings

спорные пропорции Ca:Mg

Сообщение massagist » 16 сен 2012, 13:32

Из двух противоположных мнений, что выбираете вы? Или какая пропорция у вас работает и на каком грунте/субстрате.

С чего это я начал?

А вот:
Мнение by Tom Barr "]Have hard water?

Great, you do not have to add any baking soda and GH builder to your tank. Adding enough GH to bring the levels to 3-5 GH degrees will address higher light tank needs over a week's time. You can use SeaChem Equilibrium for this or a mix of CaCl2 (or CaSO4 although it is not as easy to dissolve into water) and MgSO4 at a 4:1 ratio to increase GH. You can add this without knowing what your GH is by adding 1 degree's worth after a weekly water change (or slightly less with less frequent water changes)

Plants prefer soft water? Not so, neither myself or other experience aquarist have found plants that are soft water dependent, although there may be a few exceptions out perhaps 300 species, it is safe to say that plants prefer harder water and there is research to show this is true, (Bowes 1985), (T. Barr, C. Christianson observations of clear hard water springs in Florida, USA and in Brazil). A few plants, about 5 or 6 or so species do seem to prefer softer water, but this is due to KH, GH seems to have little bearing as long as there is enough Ca and Mg. So the GH can be dosed a little higher if in doubt or if you want to check to see if that is causing an issue or not.
KH on the other hand does seem to influence these specific plants(most are not affected) to about 5-6 degrees. There is really no limit on how low the KH can be for good plant health, but it can make CO2 measurements trickier. There is a way around that though. Still, any plant can be grown at a KH of 5 and a GH of 5-10, or less. This would not be considered "soft" water, actually it would be ideal. Thus unless you desire to grow a few eclectic species, there is no need for RO, nor DI, carbon filtration of the tap water, but doing so will do no harm to the plants as long as there is enough GH for the plants and KH to determine CO2."

"The 4:1 ratio Ca:Mg cannot be sucesfully use under water. When there is too much Po4 in the water and you have an imbalance in the Ca:Mg ratio, you will have GDA. In my experience, if you add this macros, the ratio should be the opposite 1:4 Ca:Mg. The inmediate consequence of this idea is that you can’t add too much Ca because Mg cannot be added in large amounts.
We can find out how much Ca:Mg we need in the same way I propose to do it with No3 and Po4. However, I sugest you better wait a little more if you are a beginner".
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