what is better sand or crushed coral and what are the pros and cons of each
misty, saltwatter tanks r a big thing and r very high matnence. I would recomend looking at the different kind of fish that you wnat and what there needs r. Depending on the fish I would go with sand because it is cheaper and easer to clean. go to your local pet store and ask them what would be best for you. hope it all turns out. bobiesu.
Definitely the sand. For one, you don't have to siphon, you get inverts like crabs and snails to clean it for you and it grows lots of coepods which is very good to to keep your tank better maintained and established. I think the sand just looks a lot nicer too
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As you noted, each has pros and cons, so it really comes down to personal preference. Most people go with sand-- either oolitic, dolomite, or coral-- simply because it looks better suited to a marine tank. However, these also provide you with many of the benefits of coarser coral gravel. Nearly all marine substrates will slowly (VERY slowly) dissolve, releasing hardening constituents (calcium/magnesium carbonate/bicarbonate), which helps to stabilize the pH. With sand, the finer particles allow anaerobic areas to develop, which can be good or bad. These anaerobic patches can be home to denitrifying bacteria that convert nitrate (from fish waste) to harmless nitrogen gas, or if it's a dirty (containing organic matter) substrate, toxic hydrogen sulfide gas. As long as you don't have food or poop collecting under the sand, there is little risk of the latter. With larger grains, you won't get this advantage (or disadvantage). Sand can be harder to clean if you're not used to it, but when you get the hang of it, you'll find gravels an awful substrate (larger substrates hide the waste, allowing it to rot). Sand is also easier on digging animals (fish, snails, etc.). Really, I'd go with sand. the benefits greatly outway the downsides.
