how fast do button polyps reproduce in captivity? or should i say how long does it take for me to get more in my tank than when i started?

a few months. Its a softie....so rather quickly. SPS you can literally watch grow....sounds weird but you can see the white tips...softies are quick growers with the right care. You can probably grow out a few new heads a week. Ricordea grows rather quick as well as xenia. I have been thinking about starting a xenia scrubber and then selling the xenia as it overgrows. But my mangroves are pretty freakin sweet.....so they arent going anywhere. Give them time and some good ole care. they will grow......but not overnight.

Well......you can see the white tips....and I have had half an inch of growth in 4 weeks. Thats pretty insane growth rates. its birdsnest. Not literally......but It looks like bleached tips.....but its new growth.