Bio Pellets Use -- carbon source

Phdphishnphrog
Member Posts: 4
Have used glut for years. With grands about wanting to use something a tad safer. Can the carbon from Bio Pellets (PHA) these be used for plants. These are usually used for marine aquariums? Though I have read some discussions about there use on freshwater aquariums. However, no details at to any carbon out put.
Comments
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http://www.plantedtank.net/forums/8-general-planted-tank-discussion/1245497-bio-pellets-carbon-source.html
Follow the discussion here too. -
Go to the earlier link for those who are just in the need to know?