breeding bumblebees?

[thezone]

Ok mine only success so far has been one pregnant shrimp when i didn't change my water for a 3 week period and the pH was at 6.8. I've been trying to keep my water at 6.8 but my CO2 doesn't seem to allow that. A new mix of CO2 will start off really slow and by day 3 hit a high and start slowing down at day 6. I've notticed when this happens 1 or 2 shrimps will turn reddish. Is it possible or heard of bumble bees successfully breeding in 7.3-7.5 as I plan to move all my shrimp into a bigger tank without the CO2 to keep a constant pH because mine fluctuates by .3 - .7 each new batch of CO2.