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Yet another algae thread.


Bifcus

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I continue to have issues with algae in my pond. Lately it has started causing real problems as it is forming thick mats on the waterfall and actually diverting the water flow. As a result of that, some of the water is being directed out of the pod, effectively creating a slow leak.

I have manually removed it, but it grows back.

I have an upcoming two week trip and am concerned that the algae will grow and cause water level problems.

One thing I am wondering about is whether salt would make any difference. The pond is only ever filled with tank ( rain) water, and the GH is normally less than 100. The PH is high but constant and all other parameters are normal. The pond is nearly a year old, but since spring it has had an almost constant algae bloom. It died out a couple of times but then comes back within a week or so. I am not sure if the die down is because I have added salt to try to raise the hardness, or if that is coincidence.

I have read that the hardness level is related to algae blooms, but I can't tell whether that is a minor theoretical effect, or if I focus heavily on salting I might be able to get the green stuff under control.

Any one have much experience with this?

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This happens on my high light tropical tank! The algae grows on the filter output and diverts the water to one side. Luckily, my angels and platies find it delicious so I just top off the tank and they eat it up.

Sent from my SCH-I535

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You are talking about string algae, right? They are probably major factors in avoiding green water.

I don't think hardness has much to do with algae growth.

If water diversion by algae can cause an overflow in you waterfall, you need to do some rebuilding there.

I don't recommend using salt in a tank or pond routinely. Salt is a valuable medication which becomes useless if it is always present.

I suggest you regularly scrape off the algae and toss it to the fish. It's very good food and you should feed them less.

Since you have very rapid algae growth, I suggest you get some (land) plants upstream of the algae. Plants will never starve out algae, but can slow their growth.

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Thanks Shakaho,

Yes, I do mean string algae.

Wasn't convinced about the salt hypothesis, but was looking for an easy solution. Rebuilding isn't viable was these stones literally weigh a tonne. The filter outlet goes straight to the top of the waterfall, so no options of planting there.

I don't feed the fish much as they have plenty of plants to eat. They do go crazy for the fresh algae when it gets cleaned into the pond!

Guess I'll just have to keep cleaning it and hope for some cold weather while we are away to slow the growth.

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Would you show a picture of your waterfall? Also details of your filter system. There is something wrong with your pond ecosystem. A little string algae in places that the fish can't get to is normal, string algae that grows so fast you can't keep up with it is not. I'm sure it is fixable. There may be modifications you can make to your waterfall that don't involve moving heavy rocks.

I don't understand your filter system. Do you have an in-pond filter? A waterfall filter? Or something else that makes the filter outlet go straight to the top of the waterfall?

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Hi Shakaho

I posted some pics here http://www.kokosgoldfish.invisionzone.com/forum/index.php?/topic/107733-hi-from-canberra/

Not a good close up of the waterfall, unfortunately. It is pretty clean at the moment anyway.

The filter I have is a Pond One Claritec 5000 UV. It is located nearly buried in the raised garden bed up behind the pond. I don't actually know what it's pump is, it is located down in the bottom pond, near the second pump. The water gets sucked in down in the bottom of the pond, then the pipe goes across the pond floor (under the pebble base) and comes up discretely between the big rocks and then under the retaining wall and into the filter. The output of the filter then goes to to the top of the waterfall , only about two feet of pipe or so. I am not sure if the filter is very good. You turn the nob to 'backflo' it and the water that comes out still appears as clean as the water does normally.

The second pump is just a little Bunnings cheapy, which is an integrated unit with the fountain in the bottom part of the pond. We put that in just to create a bit more aeration for the fish and it is totally independent of the main unit.

I suspect I have made some really dumb newbie mistake, but i's not obvious to me exactly what. Much appreciate you taking the time to help.

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What I really want to know about the waterfall is where you are losing water. I'm guessing it is near the pond where you have those flat stones. If so you can use waterfall foam to glue together some rocks to make a ###### on either side so the water is guided into the pond. It looks like the pond consists of two connected "circles". If you give me the approximate diameter of the circles, I can tell you the total volume. I am sure it is much more than 200-300 liters.

I can't say for sure without knowing the volume of your pond, but I expect you are right in thinking your filter is inadequate, even though it was pretty expensive. Can you get up the nerve to learn how to make your own filter? It's scary, if you start out like I did knowing absolutely nothing about plumbing, but it's really not hard at all. I'd like to see you make a ~40 l bog filter like these:

http://www.kokosgold...container-pond/

http://www.kokosgold...ner-bog-filter/

Then you could run the water through the bog filter and then into your current filter.

Your pond actually looks pretty healthy, but will will need to find homes for those babies. Do I see rocks on the bottom of the pond?

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