Thanks, Steve, I'm not much at photography but was lucky to have a friend nice enough to shoot these this past July. Sps have grown some since then and I should update in the next few months.
Just kalk. I do add a a tblspn of of baked baking soda once every 10 days or so and 3/4 tblsp of calcium chloride to make up for times the kalk dosing is stopped for a few hours to refill the resevoir, mix and settle.
I also dose vodka and vinegar which drop the ph a bit and offset typical high kalk ph issues.
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