safely reducing KH
I have tap water and my kh is about 16 in a heavily planted tank 29g with
diy co2, gh 12, ph 7.7, NH3 0, NO2 0. How should I go about lowering it safely? I may know the answer to my own question but I am not a very confident aquarist quite yet. But how about doing week water changes? Up to what percentage would be safe to do weekly? My tap water has a kh of about 4. Yes I'm not sure how my KH got so high, my tanks only been set up for 3 months now. Thanks for the advice in advance. |
safely reducing KH
"M Walczak" wrote in message
hlink.net... I have tap water and my kh is about 16 in a heavily planted tank 29g with diy co2, gh 12, ph 7.7, NH3 0, NO2 0. How should I go about lowering it safely? I may know the answer to my own question but I am not a very confident aquarist quite yet. But how about doing week water changes? Up to what percentage would be safe to do weekly? My tap water has a kh of about 4. Yes I'm not sure how my KH got so high, my tanks only been set up for 3 Depends on what fish you have in there......as a general rule, little & often. Of course if you are trying to reduce anything through small water changes the more water changes you have to do. In practice you could do a couple at 10% & then a few days later do 20% & then maybe 30% & then anything upto 50% as many times as you need to (always a few days apart) - if you work it out the rate of change in the KH is not linear after the first change..... ie after the first 10% change you have 90% old water & 10% new water after the second 10% change you have 81% old water & 19% new water etc etc.... By the time you have changed half the water when you do a 10% water change you are only actually changing 5% in effect if that makes sense. As to why it has climbed so high, you have a source of Calcium carbonate in the tank - probably a rock. If you have rocks in your tank take them out & test them with Vinegar - the one that fizzes is the culprit. I. |
safely reducing KH
M Walczak wrote:
I have tap water and my kh is about 16 in a heavily planted tank 29g with diy co2, gh 12, ph 7.7, NH3 0, NO2 0. How should I go about lowering it safely? I may know the answer to my own question but I am not a very confident aquarist quite yet. But how about doing week water changes? Up to what percentage would be safe to do weekly? My tap water has a kh of about 4. Yes I'm not sure how my KH got so high, my tanks only been set up for 3 months now. The better question is, how can you keep KH from rising from 4 at the tap to 16 in the tank? Look for the following: * Seashells * Shell fragments in the gravel * Limestone * Marble * Aggregate or cement-type rocks The aforementioned vinegar test will reveal most of these. Remove the source, and the problem is solved. |
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