Chemical for non-fish pond?

addy1

water gardener / gold fish and shubunkins
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Chlorine like a pool or even salt like a salt water pool
 
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Will either of them hut the pump? I was so tired of fighting the green algae last year and the fish would always hide and never come out. We have a water fall and a fountain going in it so just thought maybe we don't want fish in it.
 
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I like triple chelated copper based algaecides for fountains (no fish or plants). If the fountain was very white on you didn't want an aging look I'd go with ammonium. Not as effective against as many kinds of algae, but still good. These are very long lasting so you don't need to add stuff every few days.

Most copper is considered portable water safe at the directed dose, and that will be a tiny amount for a fountain. Dosing higher doesn't work any better and can hurt birds who come for a drink.

A "green" solution would be peroxide, something like GreenClean algaecide. The peroxide at the drug store might would, but you might need a lot, like a few quarts. The down side with peroxide is the algae can come right back. Products like GreenClean are much more concentrated but pretty expensive for me.

Chlorine is great for an initial treatment if there's algae present. Not my fav long term because you have to keep adding it and I'm not a fan of the odor especially if the fountain is in an enclosed courtyard. It takes a pretty high dose of chlorine to kill algae. For example the normal chlorine level in pools can still allow algae growth, but mainly the macro algae kinds than grow on the sides.

Salt isn't my fav because it takes really high levels (lots of algae species love high salt content) and you get scale build up which looks bad imo.

None of these will hurt most pumps, especially fountain pumps. Some large pumps have steel cases and so salt wouldn't be good for them. I don't know how big a fountain we're talking about.

Mosquito dunks will control mosquitoes.
 
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Thanks for the replies. Its about a 400 gal pond with 2 waterfalls and a fountain. And has a regular liner not the molded kind. We drained it last fall and covered it, so now its time to open it back up. Just don't want to fight the extreme green algae we had last year.
 

sissy

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You can buy the stronger concentrated peroxide at most medical supply stores .I buy it in a gallon bottle and it is only 2.99
 
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I know this is a bit of a necro thread but im having the same issues. I have a new pond with old pre form liners and im watching over it the past 2 months for leaks and rain. My bucket waterfall had a hole in it so i had to tear everything out and scoop mud out and get water pooling out from under. Anyways u can see why i dont want fish because im working the kinks out. I enjoy my fountain and thats good for me. But before i drained it this week to fix the leak my water was infested with i guess algae. Center deepest water was so murky i couldnt see. I dumped some walmart algae killer in there and it did kinda breakup the algae or whatever that was but the water was still nasty. Going fwd and planning on draining it for the winter i think ima have to treat my small pond as a pool and dump chemicals in it each week. My pump is in a filter box but only had some sludge in it and the filters dont actually seem to catch much
 

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