Coolant

I am new to water cooled PCs and I have a water cooled CPU and GPU. My previous coolant was Corsair XL8 and it seems to have created a lot of brown residue on my GPU block. Besides that it seems like it runs fine, but I am not well educated in water cooling. If anyone could help out that would be great! I was looking at EK for my next coolant, but I am not sure.
Here are my spects:
System Configuration:
Chassis Model: Digital Storm Velox
Processor: Intel Core i7-12700K (4.9 GHz Turbo) (20-Thread) (12-Core) 3.6 GHz (Alder Lake)
Motherboard: ASUS Prime Z690-A (Intel Z690 Chipset) (Up to 3x PCI-E Devices) (No SLI) (DDR5)
System Memory: 32GB DDR5 5200MHz FURY Beast
Power Supply: 1000W Digital Storm Performance Series (Semi-Modular) (80 Plus Gold)
Storage Set 1: 1x SSD M.2 (2TB Samsung 980 PRO) (NVM Express)
Graphics Card(s): 1x GeForce RTX 3080 10GB (VR Ready)
Extreme Cooling: H20: HydroLux PRO: Exotic Custom Cooling System (1x Graphics Card + CPU)
HydroLux Tubing Style: HardLine Tubing
HydroLux Fluid Color: Clear Fluid + Clear Tubing

Originally posted by hoserator Call DS and tell them about the residue build up. It should not have happened. Is the Corsair XL-8 coolant the one that came with the system? You can get a cleaning solution from EK and rinse repeatedly. I use a 24-pin ATX remote power on-off switch jumper to turn the pump on and off without having to boot up the system.

Yes the corsair XL-8 coolant came with the system. I have heard through research that corsair changed their coolant and they seem to be getting some complaints. I will make sure to contact DS right away. Thank you for the reply!