LyndaB
Aquarium Advice Addict
Can I ask, why is one 50% better than two staggered 25% pwcs, just curious.
If you do two water changes, with the second change, you're removing part of the new water you put in with the first change. Of course, it's all been mixed in with the existing, so it's not "all" new water you're removing, but it doesn't make sense to me to do smaller ones. I just personally don't feel it's as effective.