Substrate for a natural swimming pond - help!

[combatwombat]

Great looking feature, @loggerhead. What is the substrate you are using on the bottom?

 

[loggerhead]

It is a black EPDM liner with pea gravel size Granite stone. The bogs are on top of the gravel which is 80% peat moss and 20% play sand.

 

[loggerhead]

Plants grow awesome in the gravel stones without any issues. All plants are planted directly in the gravel with no soil. I do have a lot of goldfish that helps give nutrients to the plants. I test the water every week and it's perfect. I researched the NSP idea for 5 years before I started the design for another year then started construction. It took 6 months to build this by myself with no help.

 

[Mmathis]

@loggerhead Why don’t you start your own thread about this. I have noticed this is the 2nd thread you’ve posted pics in, but these will get lost among others posts.