so many configurations and colours of bead and so many numbers.
dunno which one is best
dunno which one is best
yea! and they are the cheapest i can find around. jusco has something similar at almost double the price.
i use the greenish blue ones. i agree they really induces a growth spurt.
if you don't mind me being gross, get your children to pee on it. free and works the same way its the nitrogen, phosphate and potassium that drives growth and pee has no lack of that plus more =D