Crazy Low pH, and a desire to keep CPDs

[Brett]

Hi All,

Hoping I can get some help here. My 36 gallon bowfront has super low pH. Like, between 5 and 6. It's closer to 6, but the API test isn't that precise. The tank has been running for a few years now, and I have lot of driftwood and plants going (the driftwood is actually much older than this iteration of the tank, but I digress). 

I'd really like to add a large school (12 or more) of CPDs. The existing stock will be 20+ Sterbai cories. I'm concerned my ridiculously low pH will be an issue. Should I try to raise that? If so, how? Or do you think the CPDs will be happy in that environment? 

Also, disregard the second sponge filter. That's just cycling in anticipation of my partner's tank being ready to go. :)

Greatly appreciate the help!

[Patrick_G]

 If your tap water is closer to neutral you can try adding crushed coral to the tank and doing a big water change. That should help keep the tank water closer to the original ph of your tap water. I’ve been using this trick for a few months and It’s been working well for me.