outside garden pond water turned green?

Question

900 gallon pond,mature,filtered correctly ,water turned green in the last week and lots of blanket weed on plants,is this due to the mini hot weather we just had

Answer 1

Try getting some fish they will eat the algae. The heat wave will cause the algae to grow unbelievably even if you have a filter. I think we're in for an exceptionally hot summer and it will be a constant battle against the mean green algae in ponds and fountains.

Answer 2

Go to your good local garden center and ask for something called "Auquashade" It works good. It turns the water a blue color and keeps the suns rays from penetrating too deep causing your alge bloom.

Also, the surface of your pond should be covered at least 30 to 40 % with plant material. Try water hyacanth. They are cheap and grow like crazy. Too much covreage? Toss some out. They are annual in most places so after frost, get rid of them.

By the way, alge in your pond is a indication that your pond is extreamly healthy, it is just ugly to look at.
Good luck.

Answer 3

you have too much algee, we have around an 800 gallon pond thats 3 years old. You can eithor get fish to eat it off or there is a new product we found that will actually disolve the algee without hurting the other plants. For the green water there is some kind of biological mix we used last year, i forget the name..sorry but they will actually go about and clean up the water by eating the algee and then later on they die after 2 weeks. Sort of like sea monkeys you can say. But ask your local plant place

Answer 4

Hot weather increases algae and blanket weed growth. Float a bale of straw in the middle of pond attached to strong string to draw the weed, make sure there are plenty of water snails and oxygenating plants in water to help balance water

Answer 5

Hi,

If you use tap water to fill a pond it will turn green - due to nutrients in the water. Rain water is best, but don't worry if you had to use tap water - most of us do from time to time. Sunlight will cause blanketweed to grow pretty fast. One way of avoiding this is to try to ensure that the surface of the pond is at least 1/3 covered by plants such as waterlilies, floaters etc. You can also use reeds, which help clarify the water. Planting and surface cover will help to provide valuable shelter from the hot sun and keep the water clear. Make sure you use aquatic soil for planting, as compost contains a lot of nutrients, which will foul the water.

If you don't have this much cover yet, use a bag of barley straw to combat the green water (use an old square of net curtain to make a bag around 6" square (or round - the shape is up to you) and pack it with barley straw - available from your local pet store. Tie it to stop the straw from escaping, place the bag near to the water flow of the pump and sink it with a half brick or stone. Don't worry if it floats at first, it will sink, but may take a day or two.

As the straw rots, it releases a chemical to clear the algae - the stuff that makes the water green. The straw will disappear over time, so you may need to replace the bag at approx 3 monthly intervals to keep totally green-water free, but it is worth the effort! I use barley straw to keep my pond clear - you can also use it in small water features to keep them free from algae buildup.

If you aren't able to hold of the barley straw, your local aquatic centre will sell pads of it - but I find it far cheaper to make my own!

The water will settle down and clear in approximately 2-3 weeks - then you can sit down, relax and enjoy your pond - as you deserve.

Happy water gardening!

Kath

Answer 6

Straw, preferably barley, left in the water will kill off blanket weed. It needs to be tightly twisted if using a small amount of straw for a small pond. The larger the pond, the more straw needed, use a whole bale if necessary.

Answer 7

Yes, hot weather can cause what is known as a "bloom" where aquatic plants (including algae) turn the water a green color with viscous properties. There are anti-algae solutions available on the market. Your local landscape/nursery/pond center should carry them or can order them for you.

Answer 8

the best thing you can do is get a black pvc tank with an ultra-violet light fitted inside. the water from you pump goes into the tank and then water from the tank goes into the pond - this will help kill off algae

Answer 9

I would say so, everything thrives on the sun. Have you noticed how fast your weeds have grown!

Answer 10

add pool acid
then cloride after a few hours