Home |
Search |
Today's Posts |
#5
|
|||
|
|||
Help please! Cement in pond
Christine_B wrote:
I have recently had a company edge the pond with stone. In carrying out this process, five tench I had in the pond have died. After the work was carried out they were initially distressed, and sadly died towards the end of the day. I can only surmise that the cement from the work has entered the pond in sufficient quantity to cause polution? Is this a likely cause? There is also other wildlife living in the pond, newts frogs etc, and I am worried as to the effect the cement has on them. What is the best way to go about cleaning up the pond so as not to cause any further harm to the remaining wildlife? Hi, Fresh concrete can upset the pH of the pond rapidly but (depending on how much fell in) you can probably make adjustments. First if you do not have a method to determine pH, GET IT. Get tests for KH (total alkalinity) and GH (general hardness) also. Get all the concrete possible out of the pond, assuming that some fell in. If the new edge is under water lower the pond level temporarily. I don't know what tench prefer but a stable pH is usually more desirable than a particular number. There could be other problems, perhaps they spilled something else in the pond. If KH is high (above about 200 ppm or 11 degrees) and pH is high (above 9), then use muriatic acid. Available at hardware and pool supply stores. Put 2 oz. acid in a five gallon bucket, fill with pond water, and disperse it throughout the pond. A dose of 2 ounces per 1000 gallons lowers KH by 1 degree (20 ppm) releasing it as CO2. CO2 suppresses respiration in fish, so the pond should be well aerated. Next day the pH and KH is tested again. Once KH is lowered, pH will follow. It shouldn't be necessary to lower KH below about 150 ppm (8 degrees). Two oz. per 1000 gallons is the maximum daily dose. If KH is low (below 100 ppm) and pH is high (above 9), instead add common baking soda. One-quarter pound per 1000 gallons increases KH by 1 degree. Once KH is 100-150 ppm (6 to 9 degrees), pH should stabilize near 8.4. You will have to keep monitoring and treating. HTH -_- how -- no NEWS is good |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Cement residue in pond. Advice needed please. | United Kingdom | |||
Cement residue in pond. Advice needed please. | Ponds | |||
please help me with the cement mix | Ponds | |||
Cement to use/not to use around pond? | Ponds | |||
Pond sides....dry cement/dirt mix? | Ponds |