Anyone using/used Rogue Soils’ Launch Pad/Rocket Fuel?

Hello all…I’ve had a couple good tent runs using KIS Water Only soil with great results. This is my first run using Rogue Soils’ Launch Pad and Rocket Fuel. All these seedlings grew good roots but are growing very slowly? Using ViparSpectra lights, two VA1200’s and two XS1500’s. No nutes yet since only getting their first real set of leaves, but have always used GH Flora Trio & Cal-Mag with great results. Have seen that Rogue Soils say wait 4-6 weeks to start nutes? Any help is greatly appreciated! Thanks!

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Do you have a TDS meter? If “no” search this site for info (more than you can read) and get one.