Planted FW tanks, substrate, pH and CO2 questions ..

[Delphinus]

Got a link to that by any chance? I'd love to read up on that.

Awesome looking tank btw, I like the look of the two different substrates. I wouldn't have guessed it would look so congruent but it has a nice flow to it.

Those cherry shrimps - I'd love to try them but I fear they'd be clown loach food. Is this a baseless concern, should I try some?

Here is a link that explains the co2 to air loss. He is known as plantbrain here.

Here is his latest journal. Click on page #4 to see his sump.