Feb 12, 2000, 9:54 PM
Post #9 of 43
Which is more dangerous, high or low pH?
[In reply to]
Lost all the kois last night in the kiddie pool. May be I should what happened to my pond so that it is easy to analyze the problem.
Pond description: 4'5" x 6'8" x 4'. Two filter chamber each 3'x 1.5'. First one is filled with brush and green net. Second, is with filter mat bought in Syarikat Atari in Tmn Desa. First filter is fed by bottom drain from the pond. Then submersible pump is used in second filter to pump water out to 1 stream, 1 waterfall and 1 middle water return.
Pond finished on 28 January. Then filled with water and the waterpump is used to keep water running 24hr. Hydrochloric Acid was added up almost daily to keep pH at 5. This was done up to 6 February when the pH stay stable at 5.
On the 7th, water with acid was drained and replace with fresh tap water. 2 kg salt added along with dechlor. Add all the brush, net and filter material and let the water running.
On the 8th, pH is 8 and two kois introduced to the pond.
9th Feb, Nothing happened to the two kois and 5 kois is added. The seem active and look very hungry but I only feed them a little. I worry about ammonia building up.
10th Feb, added 2 new kois. In the afternoon, took pH reading and result is 9.5. Ammonia and Nitrite readings were zero. Add 1 bag of zeolite in 2nd filter chamber. Add 2 bottle of pH down. The amount is enough to treat 600L of water.
11th Feb, pH at 8.5 in the morning. Decided to do 30% waterchange. This suddenly made the pH swing down to 7 and the fish dying within minutes. Took out all the fish in the pond into kiddie pond and they keep dying. In the afternoon 3 hours after water change, I noticed that the water in main become chalky white.
Today, Even though there are no fish in the pond, I keep the water running. The water still chalky white and the pH is 7.
So, thanks for everyone concern. I'll gather all my strength and suck in my pride and made one commitment. I'll never give up this hobby.
To all the guru here, please give your best shot on what the problem really is. I knew may be 90% is my own mistake.