Canister filter

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Can you use an aquarium canister filter
for pond ?
Or is it not safe to use outside ?
 
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Can you use an aquarium canister filter
for pond ?
Or is it not safe to use outside ?

You can (meaning they will work if you buy one the right size for the gallons you plan to filter) but they are not rated for outdoor use so they won't last long in inclement weather (they do not freeze/thaw gracefully) and pose a major electrocution risk in wet weather. If your pond is on the patio and you can be sure the pump stays dry, it could work.
 
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Unfortunately I think it would get wet but we don’t get that cold it would freeze
 
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Unfortunately I think it would get wet but we don’t get that cold it would freeze

I see in another thread that you're looking at a waterfall box. I use an 8" waterfall box with bio-media in it and a box filter in my small pond with a 1200GPH pump and it works very well. Here are the items I use that work very well for my small pond:
I use this 8" waterfall box: https://amazon.com/Danner-02477-Pro1000-Pond-Waterfall/dp/B001B4F4AK/ and in it I use these bags: https://amazon.com/gp/product/B015S1WW9C/ filled with these three types of bio-media: https://amazon.com/Seachem-Matrix-Bio-Media-500ml/dp/B071RRRXDN/, and https://amazon.com/Marineland-PA11484-Canister-Ceramic-140-Count/dp/B000NRVLIU/, and https://amazon.com/gp/product/B000NRXB5G/, and I cover those with one of these pads https://amazon.com/gp/product/B07KRSSG66/ with a small rock on top to hold it all under water and so it doesn't float out of the waterfall box. I have it connected to this pump: https://amazon.com/gp/product/B004YK6402/, and I have this box filter in front of the pump as a pre-filter (it has two filter pads inside it, the ones it comes with): https://amazon.com/gp/product/B0024EFYU6/. I have it split between the falls and this fountain head: https://amazon.com/gp/product/B004DL0Y44/. The prefilter pulls out the silt very quickly and is easy to pull out and hose down as needed. The bio-media gets put in the waterfall box and left there and keeps the water quality good through having a good bio-filter. Ideally I'd have plants to serve as natural filtration but I've not gotten there yet, in the meantime, this worked very well for me when all I had in the pond was fish. I use a little Prime in the pond when I clean the box filter since my hose water is chlorinated, and I get my bio-filter going with Stability, but any water conditioner and beneficial bacteria will do.
 
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Thank you ! This is the option I really want todo it’s just expensive getting it shipped to Australia but I’ll have another look, I think it’s probably going work out cheaper anyway
 
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A bog is the best solution for most ponds, but if you're seeking a mechanical filtration solution, for a small patio pond, a box filter (like https://creativepumps.com.au/product/creative-pumps/in-pond-biological-tray-filter/) in front of the pump as a mechanical filter combined with bio-media in the waterfall box as a bio-filter is pretty standard, but I don't know how big your pond actually is. You need to look for pond pumps that say for waterfalls (or for features) and that are made to move the correct amount of water and which will provide enough force to make your waterfall flowrate sufficient. You really must calculate how many liters are in your pond to choose a good pump/filter solution. It is impossible for me to give you links to appropriate pumps if I don't know how big the pond is. I know you said it's 1x1.5 meters, but you didn't say how deep the water is. If you tell us how deep the pond is, we can calculate the proper size pump. We also need to know how high above the pump the waterfall will be and how wide the waterfall box weir is. This Australian pond store has many good pump options that will work for your pond once we know exactly how much water it holds and how high and wide your waterfall is: https://creativepumps.com.au/products/pond-products/pond-pumps/feature-pond-pumps/. Just tell us the actual volume of your pond or give us all the dimensions so we can calculate it for you, and tell us how wide your waterfall will be and how high above the pump it will be placed (how far above the water in the pond the waterfall will be also works once we know how deep the pond is) and how much flow you want it to have (gentle flow versus a rushing waterfall) and we can help you pick good filtration and pump options. A pressure filter (which is similar to a aquarium canister filter but made for outdoors and ponds) is a more expensive but more robust option. You still need a pump to push the water through it, they do not come with built in pumps: https://creativepumps.com.au/products/pond-products/pond-filters/pressure-pond-filters/. Additionally, it's still a good idea to have a box filter in front of the pump as a pre-filter, but just putting the pump in a mesh bag can work so long as you do not have many leaves falling into the pond. IMO, it would be overkill for your patio pond unless it's way deeper than it looks.
 
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