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Curious how others will chime in here. And also, what made you start using CaCl2?

Not that it will help you that much since I don't have R macranda but I'll throw my specs into the mix just in case.

10gal tank with Amazonia type soil using RO exclusively. I use CaSo4 and MgSo4 at a 27:10 ppm ratio to achieve ~6dGh. I also haven't gotten away from NaHCo3 yet that I dose to target 1dKh.

SO4 toxicity requires a lot. Not sure you can get to toxic levels of SO4 with normal maintenance routines and dosing regimens. Of course I'm sure there is someone out there that has done it. :laugh2:

 

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Oh, got it.

I always use a power head/sump pump recirculating water when adding Ca:Mg to RO, be that a 32gal trash can or a 5gal bucket. Then run off and do something else. Never had to wait for it. But then again I'm not sitting there watching it dissolve

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