The R-culture range contains 50U for 500 liters, that would mean 10 units per 100 liters, so 10 units equals approx. 1 grams per 100 liters and LH equals approx. 0,2 grams per 100 liters? Is that really enough culture? My current culture goes at 5 grams per 100 liter.

Btw, I am going to sleep now, it is 23:59 pm over here. Thanks for all your help, I will read the comments tomorrow.