KISSfn
Fish Herder
I have no idea why the pH crashed. Today was the first low reading since tank was started in March. I don't test for hardness but the Dallas Water District claims our water is in the moderate range of 80-100ppm.

I've read Tiger and Green Barbs are supposed to be hardy.
Do you see any unusual behavior in any of the other fish?
Honestly, it's not the pH; tiger barbs are very, very hardy fish; pH is extremely unlikely to affect them. I think they're being injured by the other fish; tigers are very rough with each other; I have 20 and I still have females that lose their tails almost completely at spawning time.I think its because of the pH. Are they sensitive?

Thanks Erik!Do you have any idea as to why the pH dropped? Is your water really soft?
I have no idea why the pH crashed. Today was the first low reading since tank was started in March. I don't test for hardness but the Dallas Water District claims our water is in the moderate range of 80-100ppm.