roadmaster
Member
Either size will work fine for the H cuba.
Yes lime free means it won't increase /decrease hardness or pH.
Would place the cory's in the tank only after plant root's have established a good hold (weeks), lest cory's uproot the newly planted plants while foraging/sifting through the substrate for foods.
The fine gravel will hold plants, and allow bit's of organic matter/waste,food bit's, to eventually find it's way to the lower regions and as it dissolves,will be processed by plant's..
This is an advantage in my view over sand cap's, where afore mentioned matter would remain on the surface of the sand.
More important for corys is good O2 levels, moderate movement of the water,and not too warm temps.IMHO
Yes lime free means it won't increase /decrease hardness or pH.
Would place the cory's in the tank only after plant root's have established a good hold (weeks), lest cory's uproot the newly planted plants while foraging/sifting through the substrate for foods.
The fine gravel will hold plants, and allow bit's of organic matter/waste,food bit's, to eventually find it's way to the lower regions and as it dissolves,will be processed by plant's..
This is an advantage in my view over sand cap's, where afore mentioned matter would remain on the surface of the sand.
More important for corys is good O2 levels, moderate movement of the water,and not too warm temps.IMHO