What do I need to buy to fix my problem? I bought this system from CyberPower in 2021 and the parts list calls it a: A-WATER-176 BITSPOWER CP HYDROFLUXE CUSTOM WATER COOLING KIT 360M M RAD/ D5PUMP/INTEL CPU BLOCK.
Also, does the system need a pressure-relieving cap installed?
Link to pics, follows. Pics were taken after I refilled the reservoir.
https://1drv.ms/f/s!AmHtHu-we7R99As8SVtb_gSbYuId?e=PO6zpl