Planted Tank Obsessed
Join Date: Jul 2012
Location: Los Angeles, CA
What are you trying to grow in your tank? A potential plant and fauna list might help people answer your question better.
I use ADA Amazonia, Amazonia Light, and Malaya in all of my tanks. One of my 20gal tanks uses Amazonia light and I do a 50% water change with tap water every 3 to 6 months and just top it off with RO water every week in between. I haven't checked my KH in a while, but I can let you know what it sits at right now when I have time to run a test. All of my plants do extremely well in the tank as I use it to grow out plants for sale. I'm also currently using it to grow out an angelfish spawn of about 50 <dime size fish and haven't had any issues. The red cherry shrimp I have in there seem to be doing well and are breeding.
I also have a 2.5 gal nano with a very thin layer of Amazonia (regular) which uses RO water exclusively. I use it to grow out my Sakura and Painted Fire cherry shrimp. I dont add any KH boosters aside from Tantora white mineral stones I get from Amazon. Just from observation, I think my shrimps do better with the rock than without it.
In summary, I dont know how necessary it is for you to adjust the KH of your water (but that obviously depends on what you are trying to grow).
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ADA 120P, DoAqua 90P, ADA 60P, ADA 30C x2, ADA 45P, ADA Mini-M