Hydro SCROG RDWC CO2 600W Mars Hydro

Well, I have just put 20 seeds in the pellets. Not sure how much will germinate as some of the seeds are a bit older and kept in the fridge. Target is 10 pieces but I can scale up to 15 or even 20. Want to put them in SCROG so I already put the net above it at 25CM. Since I have the idea that I just want to top, scrog and defoliate I will start topping on the 4th node. That will probably slow down everything but that is not my main concern. Just a bit afraid that IF they all come up I just have one or maybe 2 weeks to defoliate below the net. Inspection in the barrels is not an option so I have added a waterlevel tube to see what color my solution has. Then I can add H2O2 when water turns yellow/green. 09-09-2021: 11 out of 20 are already up. So I can start anyway. But I am hoping for more Runtz Or Purple Haze 10-09-2021: 14 out of 20. Need just one extra to start 11-09-2021: last runtz seems to germinate. I am choosing this one with one gelato as a backup. I have 14 fully germinated seeds and that half germinated. I needed 10 OR 15. I am going for 15 and hope that the Runtz will come up fully. Problem is that roots are coming through the rock wool so they must be placed in the system.