iam useing smaller net cups but big flood bin take 3 min to fill then leaveing water for rest of 15 min? that ok???
12 mins of total flood might be a bit much , what medium do you have in your tray? Hydroton , rockwook ?? if your timer has less that 15 minutes on i would try and drop the flood time , if not space it out to a couple of feeds during lights on to be safe . . . and if they are seedlings/clones use some very weak ass nutes and build them up to it, otherwise you could shock or even badly damage your babies, make a note of times/feeeds and keep an eye on them closely for the first few days at least, you should be able to notice if the plants are doing good or reacting badly, if its overwatering , try raising your pots out the tray s0 only half the medium is getting soaked, run off time will be quicker preventing drowning, its all trial and error til you get your feed/flood technique down to what they require . . . . A steep learning curve at first , but you'll reap the rewards for it at a later date. I'd of probably done one plant at first to see how she reacts, but each to thier own i guess . . . enjoy it , and try not to overlove them , end of the day its a weed, left to do what it does best without all the panic and overkill she should be fine