What is too fine for substrate?
My question is.......
Is the rule with fine substrates that the only reason people dont go smaller strickly to prevent anaerobic pockets?
What makes me ask is they are repainting the lines and markings on the streets near me and I noticed that they were using a HIGHLY reflective silicate of some kind on top of the paint to make it reflect.
I noticed that the leftover on the ground spread out around it made these beautiful refracted light rainbows and got to thinking.....IF i could use that as a substrate not only would it be beautiful BUT might reflect some of the light back towards the plants making my lights more effective.
The only downsides I can think of would be mulm build up on the surface and possible anaerobic pockets. Which both should be able to be fixed with MTS and turning the surface during water changes.
What do you think?