Saterday nights Quiet
so for you to read Glen
In a stable system( filters, live rock ( experienced hobiest ect ) and the hobbiest doesn't overfeed and regular water changes are done, it takes about two - three months. (It may vary , but point is no action done today can push up nitrate in a week or two to a noticeable level if keeping a healthy ecosystem because of the length of time for the nitrogen cycle to complete its self ).
For nitrates to rize from a " fresh start " because if there were no nitrates to start with and we are carefull not to spike ammonia , the conversion of ammonia is a constant 0.05 - 0.1ppm and takes about a week to convert into nitrite and that same PPM value then gets converted into nitrate , , but there are some anaerobic bacteria in deeper layers of gravel that (will eventually ) take out a little and your water changes take out a little , as well as macro algaes and nuisance algae that are constantly " eating and thinning the nitrate level -
The only way to increase nitrate in a short period of time ( Im not advising at all , just theorizing ) is to have a excellent aerobic filter and slightly overfeed several times a day .
the constant ammonia and with a high bacteria count will quickly convert ammonia through the nitrogen cycle and stop at nitrate.
P.S this will push up the phosphate reading as well as there's phosphate in all foods.
So in closing you cant add different filter media and expect the nitrate to rise - It all comes from the food and bio load you put into the tank, not the bio media or its ability to perform the nitrogen cycle.
Something else to think about:
Even though there is a redfeild ratio for nitrate and phosphate reduction - there is no ratio for the build up because ammonia is breathed out through the fishes gill as part of respiration , but not phosphate , and all foods fed to our fish have phosphate in it , but at different concentrations -EG Frozens Vs dry foods and in the dry foods Good qlty Vs poor.
So if you are left with Phosphate and no nitrates , maybe you are introducing too much phosphate , so changing the diet or adding phosphate absorbers would be better than aiming to increase nitrate to correct a ratio in hopes it all comes down " Naturally "
The food waist or any bioload decomposing organics, doesn't just go through the nitrogen cycle , it plays against p.h by allowing organics to bind to hydroxils and seperate them from hydroniums which increase acidity thus dropping p.h as well
I Hope spelled hydroxills and hydroniums close enough ( Phonetically they right
) Google doesnt spellcheck them...
Chart later
D