jonzer said:

finally got 2 lvl 5 serums,,,have injectors, but don't know what to do with them. Do you fuse them first, and then try to inject them? Do you do it in the bio-lab? Just don't want to screw it up. Thanks in advance for any help. Enjoy the game.

Greetings.

It depends on the result you want to get. If you want a level 6 Serum, just fuse your 2 level 5 Serums and activate them in your lab. As soon as you decide to activate another Serum, you can use Injector to take it out and then replace it with other Serum. Please be aware that the Injector is a disposable Item.

If you still have any questions, please ask. I'm sure that experienced players on our Forum can explain you the process with more details.