FWFishTanks
Aquarium Advice Addict
I don't have much money, so instead of filling my 75 with all eco, could I have a 1.5 inch gravel bed on bottom and 1.5 inches of eco complete on top? Does the eco on the bottom really have any significant benefits? It just seems that the bottom eco would be out of the water column, out of reach of nutrients. All I get is allowances so my money is scarce. Any suggestions or advice is appreciated!