Round 2 RDWC - West Coast O.G. FastBuds

3/30 - everything’s going well. Added some more LECA. 4/5 - increased PPM to 400 as they started yellowing a little. I don’t know what is going on as they’ve barely grown. The new small leaves that should be growing into colas are almost pure yellow on one of the plants and it’s noticeable on the other. This is getting incredibly frustrating to deal with. Too much time and money has gone into this with no upsides of hydroponics like faster growth. By this time in soil my plants would be ready for lst and defol…temps RH and PH are in check also using bennies and myco. There’s an 18L/min air pump with 4” air stones in each bucket and the res with a separate air pump so there’s a lot of DO. Anyone have any suggestions? Thanks to all that have commented, liked or followed! 🙏