New tank, need a refresher - The Planted Tank Forum
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post #1 of 2 (permalink) Old 10-23-2015, 05:26 PM Thread Starter
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Question New tank, need a refresher

I'm just restarting my planted tank after several years, and I need a little refresher....
We have ridiculously hard water, so this time when I setup the tank I mixed 50/50 tap & RO water. I have a fresh Hagen KH test kit (I ran out of drops before since my water was so hard!), and I get 19 drops in before the 5mL of water is reasonably yellow... according to the directions this means my KH is 190 PPM.
To use CO2 level chart I need to convert PPM to DK by dividing by 17.86, correct? So 190PPM/17.86 = 10.64KH
My rested tap water meters out at 7.8 on the pH controller with a brand new, freshly calibrated probe.
So if I remember correctly, I want to turn up the CO2 until the pH drops to a level that indicates a good CO2 content, right?
Currently my pH controller is reading 6.6, but I still don't see any plants pearling ever. I only have one fish (bluegill sunfish) currently, but I don't want to go too low and stress him out.
Does it sound like I'm doing something wrong? I have all real easy starter plants like cabomba, hornwort, and anacharis.

Thanks for the feedback...

Dan O

46g bowfront, BML 6300K, Black fluorite, Filstar XP3, pressurized Co2, Milwaukee reg & SMS122, AM 1000

5g 36W 6700K, flourite, ZooMed 501, DIY Hagen Co2 & bubble ladder
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post #2 of 2 (permalink) Old 10-23-2015, 09:45 PM
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I also have very hard water. I used to 50/50 RO to tap water, but was a little worried about what, exactly, is in the tap water. So, for peace of mind, I've taken to re-mineralizing RO water with SeaChem Equilibrium (GH) and (KH). My target is 5 GH and 5 KH. I have angelfish and they prefer a KH in the range of 1-5 dkh. I don't know what bluegill sunfish like.

I get pearling in a 30g heavily planted tank with a little over one bubble per sec. of CO2. At 4 bps there was massive pearling and the angels were at the top gasping for oxygen. I don't use a pH controller.
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