Has Anyone Used Coral Sand In A Coldwater Tank?

[goldfinger]

Hi I have a basic question If I used a coral based sand substrate what would happen?
PH would go down correct?
Plus another quickie Algae and moss does that ruin porus dead coral?
 

 

[techen]

Crushed coral or sand etc rises PH not lowers it. Take my marine tank, I have marine sand in there and it pushes my PH to around 8.4 and keeps it there.

 

[fluttermoth]

Coral sand is also too sharp for most freshwater fish; anything that tends to sift through the substrate , like goldies do, will have their gills irritated by it.
 
Even fish that like hard, alkaline water, like rift valley cichlids, don't normally have a straight coral sand substrate for that reason.
 
Algae and moss will damage dead coral, yes; the roots will eventually break in apart; it will also dissolve gradually.

 

[goldfinger]

Okay thanks for the info guys!