F5 monitoring instance service

Hi all,

I have a case about monitoring member in pool. I need a best monitor type for this case:

- I have a pool with two member server with monitor tcp on port 10222 for each member (node). LB method round robin.

- On each member (port 10222) have six instance service which deployed and Application Client outside call VS on port 10222. But when one of six instance failure, application client outside get error respone from F5 VS (but F5 healcheck port 10222 is alive and mark member UP and routing traffic normally).

- My question: how to monitoring instanse behind port service on each member to fix this issue?

Thanks very much