I am using RO. I have been remineralizing my tank for the past year (Ca:Mg / 3:1 / 20ppm:6.67ppm) with CaSO4 and MgSO4 not really considering the amount of sulfate being added, but considering I have had most my Panda Garra die one after the other for the past weeks I am looking for answers. I don't think this is the reason but I am taking the opportunity to improve things. So the question is: what would be preferable:
1. Magnesium sulphate + Calcium chloride
total ~92ppm of Cl+SO4
or
2. Magnesium chloride + Calcium sulfate?
total ~83ppm of Cl+SO4
or
3. Magnesium sulphate + Calcium sulfate
total ~ of 121ppm of SO4
Instinct says 2. Magnesium chloride + Calcium sulfate due to lower overall ppm value but I am no biologist hence my question.
I am also considering adding some Magnesium Carbonate (or even Calcium Carbonate which I have readily available although extremely insoluble and only useful for 0.5 degree) to slightly raise my KH by 0.5 or even 1 degree. Yesterday I measured the water and I had 1dKH. In fact I am thinking if this low Kh is not the reason why my Panda Garra have left to the other world. Now that I remember I changed my filter cartridges and RO membrane in January and wonder if that is not the reason for all this shenanigans.
In any case thanks for the input.
1. Magnesium sulphate + Calcium chloride
total ~92ppm of Cl+SO4
or
2. Magnesium chloride + Calcium sulfate?
total ~83ppm of Cl+SO4
or
3. Magnesium sulphate + Calcium sulfate
total ~ of 121ppm of SO4
Instinct says 2. Magnesium chloride + Calcium sulfate due to lower overall ppm value but I am no biologist hence my question.
I am also considering adding some Magnesium Carbonate (or even Calcium Carbonate which I have readily available although extremely insoluble and only useful for 0.5 degree) to slightly raise my KH by 0.5 or even 1 degree. Yesterday I measured the water and I had 1dKH. In fact I am thinking if this low Kh is not the reason why my Panda Garra have left to the other world. Now that I remember I changed my filter cartridges and RO membrane in January and wonder if that is not the reason for all this shenanigans.
In any case thanks for the input.
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