Not all those who wander are lost
- Jun 22, 2011
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It's not a misnomer as much as not totally defined. The underwater plants DO oxygenate, but also take in oxygen at night. If you have a lot of underwater oxygenators and a decent fish load, what can happen, especially on hot summer nights, is they take up so much oxygen that the fish can asphyxiate. So if you have oxygenators, I'd keep them to less than a third of your pond bottom surface area.That is interesting. I didn't realize that aerating plants are a misnomer. I'm happy we have the waterfall to provide the aeration, then. However, I keep getting confused about this issue because this guy seems to think you don't need a pump to have a healthy pond. https://www.motherearthnews.com/diy/garden-and-yard/backyard-pond-zm0z15onzmar That being said, the pond he built is significantly larger than mine, so maybe that plays into being able to have enough plants to do the work and his specific design...
Regarding the overgrown waterlily. I had no idea that it was overgrown. Can you tell just by looking at it? I'm also confused about this because I was under the assumption that plant life is good since it takes in the extra nutrients. Wouldn't cutting it down reduce this?
And this oxygenation is not to the same extent as surface agitation. If you have a very large surface area, the pond gets aerated via the wind and water mixing. But it takes a wide area to offset the no pump. Most of us have garden ponds, not ponds proper and our surface area isn't anything close to enough (unless you deliberately understock, which is a good way to keep your pond healthy but most of us love fish, so...!).
Your waterlily being overgrown isn't a problem, you're just being alerted to the fact it may jump its pot and get loose in your pond. You can bring up your water lily and divide it into more units and repot. So then your one overgrown lily is now maybe 3 lilies. The reason we approach it this way is because there are horror stories of trying to thin/eradicate water lilies after a bout of long freedom. Best to keep them under control, hence pots. Water lilies aren't the best re water filtration but the shade they give and the esthtics as well as beauty re flowers, is worth it.