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- Jul 8, 2015
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- Hardiness Zone
- USDA Zone 7a
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Don't let Moby become your white whale then . I'm surprised the previous owner didn't give you some instructions on how they're fed?
Fwiw, inheriting a Koi pond is about the steepest learning curve in terms of pond maintenance, but don't let that put you off, it's all perfectly doable but you just have to get your processes right. So bottom line there's a pump somewhere in your pond, this sucks in the dirty water which goes into the two barrels (google skippy filter) to filter out the waste, also passes over a UV light, and finally puts the water back in through a waterfall. The two barrels use various means to trap the bad waste (google mechanical filter and biological filter), and there are good bacteria (google nitrobacter) in there that then eat the waste and turn it into something more benign (google ammonia, nitrate, nitrite cycle ponds). Some plants are notoriously good at consuming the bad waste (ie reeds, rushes, watercress) so that's why the previous owner recommended them in the filter.
Algae come in various varieties (google suspended algae, string algae), yours looks like suspended and ultraviolet radiation kills it. But you need to replace the UV bulb in your UV unit every year or so, the phosphorous coat inside the bulb wears out after c. 12 months - I'd go ahead and just replace that to be safe first. Check it's even on, maybe it was switched off in the housemove. That'll start dealing with algae but as long as your fish are pooping and the filter is full you still have more coming in, so you'll need to deal with that too. There are products you can buy to bind your algae and make it drop to the bottom, I've used them once years ago and indeed they do do just that but then the dead algae drops to the bottom and you'll still want to clear that out.
Lastly you say you have a bubbling thing, that maybe aeration. Google koi airstone - that'll be something at the bottom that just makes bubbles to increase the oxygen level. Fish like oxygen in the water and aeration makes the water circulate so it can pick up oxygen molecules everytime the water is at the surface. The bubbles don't add the oxygen, the rotation of the water does.
Anyhow enough of the soliloquy, hopefully that's given you a direction - next is pictures pictures pictures... good luck
I got pictures!