Albino Longfin babies

Was curious, what is the normal amount of offspring a breeding pair of Albino Longfin Pleco's have in one spawn? Currently I have a crop of about 50 off of one spawn, which is kinda funny because at first I could only spot 2-3, until one day they were all over the place ........

Also, what growth rate should I expect out of the fry and at what time should I remove them from the parents tank? Currently they are all in a 75 gallon long lightly stocked community tank (lightly stocked not counting the pleco babies that is).