Hi everyone, I need some help. My boyfriend and I have a 10g freshwater tank- nitrates are a bit high but everything else is fine, we've got soft water and about 6.5 pH. For a long time we just had a bristlenose pleco and some ghost shrimp, although the ghost shrimp have recently passed. For his birthday about two weeks ago, we got my boyfriend two mollies. I was told (after buying them, of course) that mollies need hard, alkaline water coming from the addition of aquarium salt, but that this would really harm the pleco. I also read however that the pH of water really won't affect any fish too much unless it is extreme in one direction or the other. I'm not really sure what to do given the conflicting things I have been told, so I'm looking to see if you guys have some experience/advice. Would the pleco and mollies do better in this soft water, or should I make the water harder to better suit the mollies (would this hurt the pleco), or am I really looking at having to take them back? I wish these sort of problems presented themselves before we bought the fish - it seems that the research we do before hand never comes up with the right things. Anyway, any and all help would be very appreciated.