1910 Census
Philadelphia, Philadelphia Co., PA
Charles Kastanek 58 born Germany
Wife - Emily 46 born Germany
Son - Leo 25 born Germany

1920 Census
Philadelphia, Philadelphia Co., PA
Charles Kastanek 36 born PA Parents both born Germany
This image online was impossible to read I could only make out the sex and age of the other family members:
Wife 33
Son 1?
Daughter 8
Daughter 6
Daughter 2 11/12

Perhaps, you can find someone who has access to the microfilm. Hopefully it is a little easier to read. I hope this information helps.