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Two shrimp tanks and a patio pond.
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Soil consisting of 60% peat moss, 40% composed bark fines and iron sulfate (50g/m3) additive, would it be ok for a Walstad tank even if it has a pH of 4? Or would it be beneficial to have a soil exclusively consisting of either peat moss or compressed bark fines?

Cheers,
Diana has experimented with a wide variety of potting soils so far with success but peat moss seems to be the universal “no”. I would look for a different soil. Use that bag for house plants.
 

· Registered
Two shrimp tanks and a patio pond.
Joined
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224 Posts
Strange, I believe Miracle-Gro Organic Choice potting mix consist of a blend of sphagnum peat moss, composted bark fines and natural fertilizer. That`s why I tried to find something similar here in Norway.
You can buy pure peat moss and 60% peat is a very high amount. I would avoid it.
 
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