PH dips

Today my PH dipped 1.2 down to 6.6, I've been trying to keep it between 7.0 and 7.4 but it seems my water is so little buffered it will dip even with momentary co2 injection. I've been using co2 fizz tabs while I wait on my co2 injection to come. A short tube to my powerhead breaks the bubbles up very finely. The system itself was rather cheap but would prove costly if used over a long period of time, the tablets only generate co2 for maybe 3 minutes each.

The bacopa monnieri is growing like crazy, and the hornwort seems to double in size every morning when I get up. The ludwigia repens along the back of my tank seems to be taking root very well, growing slowly tho, but from what I understand that is usual. The sword i'm afraid isn't going to last, it won't green back up and has quite a few brown spots on the stems, we'll see how it does over the next few days. The one I wanted to grow the best doesn't seem to be doing anything at all but rotting below the gravel, rotala nanjensha, never had it before but it was said to be a low maintenance, fast growing plant when I ordered it, I'm curious if I'm missing any nutrients in the water now. Half of the hygro difformis is growing like crazy, the rest just seems to sit and eat up my light all day, growing only a small amount so far. All of the egeria looks well but has only just started to turn towards the lighting, almost a week in my tank and again it was sold to me as a fast grower, 4/5 on the scale.

Here's a picture of Jimmy and Peanut to close out the post.