Cleaning buckets during grow?

Hello..

My first DWC grow.. Im 40 days into 12/12 .. Suddenly it struck me.. I change rez every aprox. 8 days.. But i never clean them.. Do you have to clean your buckets? Or will i be fine without?

I can even start to imagine what a PITA i would be for me to clean my bucket since im running a RDWC and a Scrog!!!

Please guide me..

I noticed that the PH is not going up anymore only going down ever since i changed nutes from cellmax to GHE Flora series..

And one more thing should i flush when i change rez with ph'd water..?

If using buckets, or even small totes just get extras and change them out. Simple.

How do i change them out simple? I cant lift one out at a time.. The scrog prevents me from this.. And remember all the buckets are connected with pipe..