Plant Substrate

[Nelson]

Can someone tell me if a 75% crushed coral / 25% stone substrate combination would be suitable for growing plants??

[BigDaddy]

Dont think about injecting CO2 down the line.  It'll dissolve the coral and your kH will sky rocket

[Nelson]

Dont think about injecting CO2 down the line.  It'll dissolve the coral and your kH will sky rocket

Considering my knowledge in this area you won't be surprised to know I wasn't considering that at all.  In fact, aside from ferts occasionaly, I'm striving for a maintenance free planted tank.

[gvv]

Crashed coral is fine for Rift lake cichlids and not good for dwarf cichlids (SA and west african), which prefer soft water. Just take this into consideration...

[Nelson]

Crashed coral is fine for Rift lake cichlids and not good for dwarf cichlids (SA and west african), which prefer soft water. Just take this into consideration...

That could be a problem since all of my tanks have the same mixture, and my 3" and 4" tanks have had dwarfs in them for some time now.  I'm about to make a major change in my 120 and I think I will go with a fine gravel or course sand (not pool filter sand) if I can find some.