Planted Tank Guru
Join Date: Dec 2002
Location: Portland Orygun
Crushed coral will raise the pH, KH and GH. And by how much and how quickly you have no idea.
If you just want to raise the pH small amounts of baking soda will work just fine.
Flourish is a supplement. Not a fertilizer. Fertilizers are foods.
Vitamin pills are supplements. Cheeseburgers are food.
To add nitrate you can use either Seachem Nitrogen or KNO3. See my Guide.
To answer #3. You can either build a DIY CO2 system, Dose Flourish Excel, or chant in the Lotus 6 hours a day in front of the tank and hope the algae listens and stays away.
To answer #4. Insufficient data.