A QUESTION ABOUT ADJUSTING MY PH IN R2 LITRE DWC

Hey all hope all is good

I think I may be having problems with PH'in my DWC system.

I PH my water to 5.5 - 5.8 and allow my system to settle a bit (pumps on etc)

I then re-check and the PH always go up to about 6.5 on average.

I'm confused at what the real PH is and if it's reading this high shall I gradually lower it over the week before I do a complete tank change or shall I PH my water to about 4.8 and let it rise to my desired PH level. Or just PH at 5.5 -5.8 and accept this is the real PH?

Cheers guys for your help and advice

I meant 42 litre dwc!!

Trust your pH tester. If it risea, throw a few drops of pH down and bring it back down. You're still safe within 5.5-6.5. But you don't wanna start at 4.5-4.8 and let it rise, you'll lock out macro nutrients.

Thankyou very much