Fixing Floramax Midnight (black) - The Planted Tank Forum
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post #1 of 4 (permalink) Old 01-17-2013, 07:26 AM Thread Starter
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Location: Minnesota
Posts: 299
Fixing Floramax Midnight (black)

After reading some of the reviews on Floramax I decided to check the pH my 10 gallon planted tank. The tank has been set up for about 2 months with strictly RO water and with an inital pH around 7. The growth was great at first but has recently slowed. I checked the pH today and found it to be 8.2+ ( chart was maxed). It doesn't seem to have effected the KH nearly as much with a reading of about 6degrees.

There has been some talk of limestone(or like) chips mixed in with the substrate. I have also noticed some discolored chunks in my substrate. Some people have mentioned placing these chips in vinegar and they bubbled. Upon reading this I came up with a theory for a fix.

What I am going to do is place some floramax in a tub with vinegar and let it sit for a few weeks. This should break down the limestone pieces. After the process is complete I plan on rinsing the substrate and placing it back into RO water to sit for a few days to re-test the pH.
If anyone has tried this in order to make the substrate inert and basically usable again let me know. Otherwise stay tuned for the results...
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post #2 of 4 (permalink) Old 01-17-2013, 12:18 PM
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Join Date: Jan 2013
Location: Point Pleasant NJ
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Ive used this substrate for 6 months with no problems with PH(6.5 out of tap) and havent raised it any. But i did wash it for a good 3 hours and then letting it soak in declorinaded water and then repeated it before i put it in my tank.

You learn something new every day
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post #3 of 4 (permalink) Old 01-18-2013, 04:40 AM
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Join Date: Nov 2012
Location: Missouri
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I don't notice a problem with my Floramax midnight.

ph 8.4 out of my tap... 8.3 in the tank.

I just hope my RO still works after sitting idle 5 years... (wet)
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post #4 of 4 (permalink) Old 01-18-2013, 05:59 AM
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Location: Tampa
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I am using floramax midnight without any PH issues. Ph from my tap is about 7.8 and is identical in the tank.
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