Join Date: Jun 2010
Location: Jakarta, Indonesia
The bigger fry is more active, eat more, grow more and produce stunting hormones which stunts smaller fry even more. No worries though, they will eventually grow. Some people remove the bigger ones to a different tank to give the smaller ones a better chance.
Your siphon looks good. I don't pre - anything, I just use them. If you're worried, soak everything for 24 hours before use. Hopefully that will dilute any harmful chemicals or what ever.