oh my.. I should have been more specific on what I meant by a ton of substrate..
sorry bout that!
It's a 2.5 gallon
I meant I have a ton in the bag still but i don't want to waste it as I'm going to be redoing the Elodea tank in my bio department this week sometime
Oh, O.K. That's a different situation, then. :-)
After thinking some more about your problem, I think you should try the approach I like to call "watchful waiting;" i.e., patiently waiting to see if the turbidity clears as the cycling progresses, as recommended by Vonzorfox
. That approach probably would be the simplest, although the most time-consuming, one. Then, if it doesn't seem to be working and you have enough soil left after you redo your biology department's tank this week, you can decide whether you want to redo your 2.5 g tank by using a different protective layer on top of the soil layer, as I recommended in my first post.
Personally, I never have had a reason to try the alternative approach you asked about in a prior post; i.e., using a smaller size gravel or sand cap on top of a too large gravel overlayer. So, I can not say how well it might work. However, I have found that a layer of Eco Complete or of a similar size substrate/gravel does an excellent job in protecting a soil underlayer and preventing excessive dispersal of its particles and nutrients into the water column.