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chiroken
09-21-2007, 01:39 PM
Have 2 choices for substrate in a 90g that will be a Malawi tank. First is crushed coral I used when the tank was Saltwater. The other if a fairly small gravel in natural earthtones, tans and browns.

I've never had to buffer up pH before (freshwater) and don't really want to be measuring sodium bicarb etc. to do it. If I use the natural gravel and add a nylon stocking of crushed coral on the top of the aquaclear 500 sponges (will run 2) will this be sufficient you think to bring up and maintain the pH? If not, I suppose I could hide the odd stocking of crushed coral in behind the rock structure.

What do you think?

Thanks,

Ken

chiroken
09-21-2007, 01:50 PM
sorry everyone, didn't spend enought time searching the archives:(

So I can assume the 2 bags of crushed coral in the 2 aquaclear 500's will fully buffer my water? If so great!! I much prefer the natural coloured gravel and one of the posters mentioned the white bottom of crushed coral can wash out the colours?

Glaive
09-21-2007, 02:32 PM
If you do not see expected results then increase your gas exchange with a bubbler.