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That stuff is as old as I am, maybe older lol... I'd just rinse the heck out of it. How was it stored?
 

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Fresh Fish Freak
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Personally, I'd lay down about 1" of Miracle Gro Organic Potting soil first and then use your laterite/gravel mix as a cap.

That's exactly what I do with my own old substrates. ;)

Some other options would be to mix it up with another nutrient-containing substrate, and/or insert root tab fertilizers.
 

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Discussion Starter · #7 · (Edited)
Personally, I'd lay down about 1" of Miracle Gro Organic Potting soil first and then use your laterite/gravel mix as a cap.

That's exactly what I do with my own old substrates. ;)

Some other options would be to mix it up with another nutrient-containing substrate, and/or insert root tab fertilizers.
Thanks. If I go this root I'd probably mix it in with the gravel. More towards the bottom of the tank and less as I approach the top layer of gravel to none at the top layer. That's how I mixed laterite into the gravel years ago. It works and probably prevents compaction and anaerobic conditions

I'm considering using Flourite mix with the old gravel and maybe adding back some API laterite.
 
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