I'm moving from a 75 to a 90. I was able to get the tank for pretty much nothing and I'm trying to keep the cost of this change minimal.
Since the only difference of the tank is the height I plan to reuse the water, lights, filters, plants, co2, filters, etc....
My question is the substrate. What I have in the 75 is basically 10 years old and is simply gravel from petsmart. Its natural in color but is probably too large in size. The plants do ok but it is probably not the best scenario.
I looked at my options and ECO soil seems to be a good option but to do the whole tank in this would probably cost almost $200.
I was thinking of adding a inch of this with a red flint on the top. Is this a good option or should I be looking at something else?