Anyway, back to the question at hand here. Put 5 gallons of water from the 90 into a 10 gallon tank , use either an air line hose or a gravel vac hose without the vac attachment, suck the fry into a 5 gallon bucket (getting the other 5 gallons of water to fill the 10 at the same time) Dump the bucket into the 10. Doing water changes 3 times a week will stimulate their growth.