We see it all the time, def leaking glycol, not necessarily a problem, and pump station could be fine - especially at the cost of replacement.
Not seen one quite that bad though.
Could be a simple case of stripping apart and re-doing the joints with proper joint sealant rather than jet blue / boss white which aren't rated for the temperature that solar systems get to.
Definitely should be drained, flushed and replenished with new glycol, purge and re-pressurised. - Als0 check the PRV and expansion vessel - they are often installed incorrectly - about 75% of system that aren't ours that we go to fix are not installed in accordance with the standards - and none of them have ever been serviced!