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Thread: Clear water

  1. #1
    Senior Member Rank = Hassai Steve1984's Avatar
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    Clear water

    Since I moved house and rebuilt the pond I've never been able to have clear water. As soon as the sun comes out the water starts to go green. Last year I spent load putting in barley straw pellets to keep the water as clear as possible but that's not a cheap option. I was toying with the idea of putting a pergola up and getting some sun sails to go over the pond to restrict the amount of sun light hitting the pond. Its in the sun most of the day. The only problem I have is that the pond is too close to the fence to fit posts and I cant go too high due to the neighbours complaining about blocking their light. Already had the conversation when I built the filter house. The only other option I can think of is to build a bog filter at the end of the pond and use it as the return from the shower. Would that help. Current set up is 2 BD's to sieve to bead to 55w UV then 2 returns under water, I then have skimmer to shower returned above the water. Any help would be appreciated I'd like to enjoy the fish this year instead of looking at green water and then the occasional fish as they swim past the window.

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  2. #2
    Quote Originally Posted by Steve1984 View Post
    Since I moved house and rebuilt the pond I've never been able to have clear water. As soon as the sun comes out the water starts to go green. Last year I spent load putting in barley straw pellets to keep the water as clear as possible but that's not a cheap option. I was toying with the idea of putting a pergola up and getting some sun sails to go over the pond to restrict the amount of sun light hitting the pond. Its in the sun most of the day. The only problem I have is that the pond is too close to the fence to fit posts and I cant go too high due to the neighbours complaining about blocking their light. Already had the conversation when I built the filter house. The only other option I can think of is to build a bog filter at the end of the pond and use it as the return from the shower. Would that help. Current set up is 2 BD's to sieve to bead to 55w UV then 2 returns under water, I then have skimmer to shower returned above the water. Any help would be appreciated I'd like to enjoy the fish this year instead of looking at green water and then the occasional fish as they swim past the window.

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    Ozone hands down speak to Malcolm at koi water garden Clear water

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  4. #3
    Quote Originally Posted by colincolin View Post
    Ozone hands down speak to Malcolm at koi water garden Clear water

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    https://www.koicarp.org.uk/koi_water..._ozoneuses.htm

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    Senior Member Rank = Jussai Twhitenosugar's Avatar
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    How about building a pergola, but slope the roof down towards the fence. So that it doesn't cast a shadow over the fence?

    Stick some twin wall polycarb panels between the rafters and bobs your uncle, a decent amount of shade for your pond. Could even run some guttering along the lowest side of the pergola and run that into a water butt - to avoid your neighbour from moaning about rain dripping on their fence.

    In terms of the pergola posts, they don't have to go behind the pond. They can go anywhere that suits e.g. sited next to the pond rather than behind it, or even onto your coping stones.

    I've bolted my pergola uprights into the wall of the pond. That way I don't have to worry about them rotting, as they stop about 1' above ground level.

    In my pond I only have an amalgam UV lamp come on for an hour over night and have (touch wood) never had a problem with blanket weed or had to treat for it. So if you are able to build a pergola, that will be the best long term solution.



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    Last edited by Twhitenosugar; 11-05-2022 at 10:38 AM.
    13,000L fibreglassed raised pond with window

  6. #5
    Quote Originally Posted by colincolin View Post
    https://www.koicarp.org.uk/koi_water..._ozoneuses.htm

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    I had the superrni on my other pond and the water clarity was unbelievable crystal clear and in full sun most of the day. I just had a polycarbonate sheet across the pond to give them a bit of shade if they wanted it

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    Senior Member Rank = Hassai Steve1984's Avatar
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    Cheers, I've looked at options for the pergola previously, I posted about using supports on top of the coping stones. I'm almost sure though it would be a dispute between me and the neighbour. I cant get posts in between the fence and pond gherw is only about 20-30cm gap. Think it would be the cheaper option and would mean no replumbing. I need to have a look more into the ozone and see about it. Could be something I could install and from reading the info sounds like it depleats the algea cells

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    Senior Member Rank = Grand Champion davethefish1's Avatar
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    How many gallons?
    A properly sized UV should keep it clear of algae...

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  11. #8
    Quote Originally Posted by Steve1984 View Post
    Since I moved house and rebuilt the pond I've never been able to have clear water. As soon as the sun comes out the water starts to go green. Last year I spent load putting in barley straw pellets to keep the water as clear as possible but that's not a cheap option. I was toying with the idea of putting a pergola up and getting some sun sails to go over the pond to restrict the amount of sun light hitting the pond. Its in the sun most of the day. The only problem I have is that the pond is too close to the fence to fit posts and I cant go too high due to the neighbours complaining about blocking their light. Already had the conversation when I built the filter house. The only other option I can think of is to build a bog filter at the end of the pond and use it as the return from the shower. Would that help. Current set up is 2 BD's to sieve to bead to 55w UV then 2 returns under water, I then have skimmer to shower returned above the water. Any help would be appreciated I'd like to enjoy the fish this year instead of looking at green water and then the occasional fish as they swim past the window.

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    Have you got your flow rate through the UV dialled in about right? Too fast and it's a lot less effective. I have a 55w and a 40w amalgam on an 18,000 litre pond in full sun and have never had an issue. It was fine before I added the amalgam, it's mainly there to keep the drum screen clearer of biofilm, but obviously is making a contribution to water clarity too.

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    Senior Member Rank = Hassai Steve1984's Avatar
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    55w UV it's around 3300 gallons, the pump is 20000 LPH and run at 100% so could that be the problem then its running too quickly?


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    Extreme Koi Member Rank = Hassai freddy's Avatar
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    I have to ask, is the U/V strip new? IME, they’re only good for 12 months before they need replacing.

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    Extreme Koi Member Rank = Supreme Champion john1's Avatar
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    I would say your running the water too fast through the UV,and as Freddy said how old is the UV tube?

    Run the UV on a valved bypass so the flow is slower going into it.

    If your thinking of a pergola my posts are on top of the copping supported with s/s rods so the posts have a gap off the toppings.
    John

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  19. #12
    Senior Member Rank = Hassai Steve1984's Avatar
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    Tube is only about 7 months old as i replaced the whole unit last year after knackering the old one changing the tube. The flow must be too much, I'll turn the pump down sew if that makes a difference. The UV is valved for easy removal but not on a bypass so something I could potentially look at doing. Your pergola sounds similar to what I was looking at doing. I was going to raise the posts off of the coping stones

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    Junior Member Rank = Fry newboy's Avatar
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    HI I have my posts on top of copping slabs on s/s pins with s/s spacers on large penny washers, thats does the trick.

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  23. #14
    Senior Member Rank = Hassai Steve1984's Avatar
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    Can someone show me how they have done the posts please when I looked I couldn't figure out what I needed

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  25. #15
    Junior Member Rank = Fry newboy's Avatar
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    Hi Drill centre of posts I drilled 8mm. Tap in s/s pin to your length. drill top of pond 8mm the pin in post drop in top of pond
    Bought s/s rod/ 8mm spacers/ 8mm hole penny washers all in s/steel. Penny washers to post side spacer to pond/washer this will stop rot. I used 25mm spacers.
    hope this helps. Ray

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    Extreme Koi Member Rank = Supreme Champion john1's Avatar
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    As Ray said above, I thought it would wobble a bit but it is very sturdy and takes my weight

    I then put a ladder across the pond to do the roof.
    John

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    Senior Member Rank = Grand Champion davethefish1's Avatar
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    Quote Originally Posted by john1 View Post

    I then put a ladder across the pond to do the roof.
    been there....
    doing my lights...


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  31. #18
    Senior Member Rank = Hassai Steve1984's Avatar
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    Thanks I'll have a look at getting these bits to see if I can get a structure up. It's really strange when ther is no I.e. this morning the water looks a lot better. As soon as the sun's out it gets really green looking. Went out this morning can see the bottom no problem

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    Extreme Koi Member Rank = Jussai NickK-UK's Avatar
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    Algae grows/blooms on nutrients and sunlight. Remove the nutrients and you will have no algae.

    In the new pond I left it to bloom initially - the growth of algae uses up the nutrients and then I use a dose of flocculant to remove the algae via the filter.

    I don't have a UVC and the pond looks like this at 1.84 meters deep:
    IMG_9742.jpg

    It sounds like your bio isn't keeping up with the nutrient production. Possibly some plants may help with this.
    Eco Pond: 13,000 litres, 20K+ lph Airlifts, 1300l anoxic, Solum 16. No pump. 58W total.

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    Senior Member Rank = Hassai Steve1984's Avatar
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    Bio is only a bead filter

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