They have since beaten Liverpool and Nottingham Forest by 2-0 margins to survive relegation.
Tarkowski said: There's been several bits. When you hit rock bottom like that, sometimes the only way is up.
That was one of the points that was made (after Chelsea). We had a meeting a day or two after and he sort of said 'fit in or don't' and the lads have all fitted in together like we had to. The Chelsea game was a disaster for us but then we've turned up like we have and got three wins on the bounce.
I think it was more in terms of it being a real low and it was time for us all to get together. So if you're not going to get with us, then don't.
Everyone just fitted in together, those in the team and out of the team, trained hard, looked after ourselves and got out on that pitch and delivered like the fans expected."