Im plannung on redsea reef base, confused as in which to buy and howmuch. They have live and dry substrate, ocean white and pink. Ocean white is very fine (0.25mm to 1mm) and pink (0.5mm to 1.5mm) Which would be better? Also i want 1.5" layer for my 54x24x24. How do i calculate? Is there any calculator for it? i cud only find carbsea sand and normal sand calculators.