Not the OP, but I'm seeing little/no growth in several species since changing the substrate in October: E. Belem, E. Vesuvius, lysimachia, hygro sunset. Practically all the vals have died off.
That's in an EI+Fe dosed tank with RM tabs, CO2, and high light. 8.3 dGH tapwater, so no GH Booster used.
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