Water inlet I tap from existing pump, making it feed three growbed. No problem since this pump I am using has excess capacity.
Those Hydroton (LECA) are smaller in size, so my 10 mm holes strainer not able to handle it properly. A quickie additional strainer made of plastic netting fixed the problem.
Three bags of LECA is not enough, I'll get another bag. So 4 bag of LECA needed for each of my growbed.
Under Growbed plumbing, I don't have enough 25 mm PVC that the reason for stepping up to 40 mm. I need to change that to all the way 25 mm.