Might be a bit premature to start worrying, but I started a minibog 2 weeks ago using a ~4 foot diameter plastic kiddie pool and filling it with a healthy combination of live sphagnum, Canadian sphagnum peat moss, pine needles and sand. I piled the media taller on the edge while the shallow center always contains a little pool of water for wetter-loving plants. I transferred many of my plants into this, and while all are surviving, none are really thriving. It could be the drought we've been experiencing down in Houston, but many of my Sars tops and sundew leaves are browning--almost looking like what happens to CPs when watered with hard water or grown in mineral-laden/fertilized soil. I've been watering it with nothing but RO water.
Could this be due to salt buildup? Or could the sand be making the media too alkaline? What's the best way to prevent buildup or maintain acidity in a minibog like this? The minibog is undrained for now to conserve water, but this may change soon if I find out it's a salt-buildup issue. Thanks.