If your fish have ich, it did not come from the wood.
The Red Wolf that you appear to have just gotten (10 days ago) is likely the culprit. Ich is commonly introduced from new arrivals.
The parasitic cyst can be on one fish, multiply, drop to the substrate, then be released and re-infect the same or other fish. You will not always notice the infection as the cyst is very small and under the skin until it expands. And of course, it's easier to see on some fish as opposed to others.
Try to confirm it's ich. Are any of the fish flashing?
No none are flashing.
The other fish seem to be okay.
Gar died this morning.