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Thread: Tempests

  1. #1

    Tempests

    Hi all , I'm having a bit of trouble with green water , i think i have to much flow through the uv, I have skimmer then 12000 ltr pump and then uv and over the top return all in a 10ft run , I'm thinking of teeing off and sending it through a tempest , ,has anybody got any thoughts good or bad..



  2. #2
    Won't do any harm what size of UV have you and is the pond in direct sun

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  3. #3
    Pond is 3000 gallon, in sunlight with a 55w uv , bulb changed a month ago..

  4. #4
    Quote Originally Posted by Scottyp View Post
    Pond is 3000 gallon, in sunlight with a 55w uv , bulb changed a month ago..
    Itís weird Iíve always run a 55w uv on a similar size pond,not covered with pergola etc so in full sun and Iíve always found a 55 to be fine but not overkill,saw something the other day about uvís and recommended a 25w up to 4000 gallons

  5. #5
    Senior Member Rank = Jussai Twhitenosugar's Avatar
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    Hi Scotty

    In terms of your question about Tempests. I don't have one, but when I looked into them, the comments from those who do have one suggest they are good at removing fines, but they also seem to require an excessive amount of cleaning.

    And they seem to need occasional dismantling to give them a proper clean out, as the cleaning method using air doesn't seem to shift all the crud out of it.

    Hopefully someone who has one is able to comment on this and give some more accurate insight.

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    13,000L fibreglassed raised pond with window

  6. #6
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    How old is your pond now Scotty?

    Not uncommon for green water to overwhelm the UV in a young pond, but once mature (18 Months / 2 years) it will sort itself out and UV will keep up.

    Obviously that doesn't apply if its an old established pond.

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  8. #7
    Quote Originally Posted by RS2OOO View Post
    How old is your pond now Scotty?

    Not uncommon for green water to overwhelm the UV in a young pond, but once mature (18 Months / 2 years) it will sort itself out and UV will keep up.

    Obviously that doesn't apply if its an old established pond.
    RS2000, can I ask why this is. My ponds coming up to a year old and is looking decidedly green today. Its c8000lts, BD to easypod, pump, tempest, 25watt UV (new buld) then back via an underwater return. I'll add a bakki shower in future to support the increased bio load. Flow is between 6-8k and I run the aerated BD for 12 or so hours to air turn over. I'm please with that this system is removing the vast majority of the fines. Just can shift the green. The books tell me 25watt of uv should be fine but it seems not. Will ot improve?

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  9. #8
    Senior Member Rank = Rokusai JimJones's Avatar
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    Quote Originally Posted by Scottyp View Post
    Pond is 3000 gallon, in sunlight with a 55w uv , bulb changed a month ago..
    Im on 35 watt uv for 4300 gallons in south facing garden and no cover - you should be acing it with that power.

    have you thought of aqua sourcing your pond as a prevention treaatment for the seasosn ahead?

    Jim

  10. #9
    I think the problem may be the uv is on the skimmer line with a 12000 ltr pump pushing it through , so the water doesn't flow through nice and smooth but rather in surges of high flow and then low flow so at weekend I'm going to redirect my main line to meke room for the uv where it will have a lower powered pump and a more consistent flow.

  11. #10
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    Quote Originally Posted by Hovis View Post
    RS2000, can I ask why this is. My ponds coming up to a year old and is looking decidedly green today. Its c8000lts, BD to easypod, pump, tempest, 25watt UV (new buld) then back via an underwater return. I'll add a bakki shower in future to support the increased bio load. Flow is between 6-8k and I run the aerated BD for 12 or so hours to air turn over. I'm please with that this system is removing the vast majority of the fines. Just can shift the green. The books tell me 25watt of uv should be fine but it seems not. Will ot improve?

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    I don't honestly know why it happens.

    It has just happened on all my ponds, and when other people come here to say the same as you they eventually come back to say it cleared on its own in the end.

    Weird stuff happens in new ponds over the first year or 2.

    I currently have another new pond, 2 months old, 3300 gallons, amalgam UV, and its going green. Once it finds a balance it will settle and stay crystal clear.

    My last 2 ponds also had stages where the water went a brownish colour in the 2nd Spring.

    But also consider the easypod might be a little insufficient to clear the algae at any pace - The UV kills it, but the algae is still in the water and is too fine for the filter to remove. Over time it tends to clump together and become "fines", and once at a big enough size the easypod will then deal with it.

    This was my 8000 litre pond in its 2nd summer running on a Nexus, all the fines are dead algae yet they managed to slip through the K1 media and back into the pond making the water look green:

    https://www.youtube.com/watch?v=dhSMf1i6MDg


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  13. #11
    Thanks RS. Appreciate the easy pod alone might struggle which is why I've added a tempest, which seems to be doing a great job. Also Appreciate it takes time for things to settle down somewhat.
    Re: brown algae. This technically isn't algae as such but diatoms. They tend to comprise of a higher silica % and can be spikey in nature. Typically benthic fish (like carp) can suffer from the associated damage these can do to gill tissue. In a koi pond the constant movement means these diatoms are highly mobile and passing over gills all the time. Only certain species become spikey but if you get a big bloom you can get some impacts. Certainly one to watch

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  14. #12
    Senior Member Rank = Rokusai JimJones's Avatar
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    UV should always be on your main mate in my opinion as thats what handles the most water turnover

  15. #13
    Yeh thinking back i never used to have a problem, but then i started messing and altering and it's gone a bit pear shaped,, so the moral of the story is only change one thing at a time and observe , change to much and you don't know where to look..

  16. #14
    Hi all, I have a tricky problem and hoping someone can help me solve the issue. I have a Cetus sieve being pump fed by oase 10000 liter pump that is pumping from a lower pond to top pond. It is situated above the easy pod, the output is level with the easy pod. From the top pond have to retro wooden trains and oase skimmer that is keeping the level of the pond by gravity draining to the lower pond to another sieve and bio chamber barrel that is inside the lower pond. It's difficult for me to clean the easy pod and would have liked to install a tempest filter for water polishing. My idea is to have a t junction from the Cetus sieve which currently has 2 inch pipework to feed the easypod gravity fed. And attach a s line for the tempest with ball valves. Therefore being able too close whichever valve in order to clean easy pod or tempest without switching off the pump and keeping the flow going to either filter depending on which I am cleaning. Because everytime I switch off the pump I have to start this game again by erasing it out and into the water a tough process to do every time to clean the easy pod. I know it's a bit unconventional but I made the set up in order to use only one pump and I want to avoid extra electricity bills. Does the tempest output have to be on the same level as the easy pod inner pipe that exits back into the pond? Do you think this is doable? I would greatly appreciate if anybody can help me with this to complete my setup and make cleaning easier. Thank you!

  17. #15
    Quote Originally Posted by dan87 View Post
    It’s weird I’ve always run a 55w uv on a similar size pond,not covered with pergola etc so in full sun and I’ve always found a 55 to be fine but not overkill,saw something the other day about uv’s and recommended a 25w up to 4000 gallons
    I was told a 55w would do 4000 gallons, I fitted two 55w’s ended up removing one and adding a 110w, no two ponds the same.

 

 

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