That stuff looks awesome!!Not sure if I am allowed to post links but it is this https://www.barlowsaquatics.co.uk/b-d-sand
That stuff looks awesome!!Not sure if I am allowed to post links but it is this https://www.barlowsaquatics.co.uk/b-d-sand
I really appreciate your post, very informative. That sifting behaviour is one I have seen in my old marine tank with a sand sifting Goby. Very interesting to watch them work!All species of Corydoras require soft fine sand as the substrate. Their natural habitats all have this, usually straight sand, sometimes a mix of sand, gravel, silt depending. But all species live over sand. They filter feed by taking a mouthful of sand, extracting any particles of food, and expelling the sand via the gills. This is as another member noted a fact of their genetic makeup. To deny them this is cruel and inhumane, regardless of other serious issues resulting from different substrate. Gravel is a risk of bacterial issues for such substrate feeders.
As for the type of sand...colour is very important because the cories "expect" to blend in with the sand substrate, and having garish colours, or white or black, causes them stress. This is scientific fact, not debatable. A buff-tone sand is natural. You can use a dark natural tone, like dark buff or dark grey. You can buy aquarium river sand (make sure it is inert, not calcareous intended for marine fish or rift lake cichlids). Or use a quality play sand. As you @ElNevera are in the UK, you can use Argos Play Sand. Much less expensive, but good quality substrate sand.
As for the background, something dark and inobtrusive is best. This will calm the fish. I use plain black construction paper taped to the outside. The tank visually appears larger, the fish are less stressed, and the colours in the tank are more beautiful.
Not sure if I am allowed to post links but it is this https://www.barlowsaquatics.co.uk/b-d-sand
Once again, thank you! I made a mistake in my original post. I actually bought the 200 litre / 55g version of the Lido. I don't know why I put 120.... It is 71cm long, 51 cm wide and ~ 60cm usable depth. They come with internal filters new but I bought mine second hand.Yes you can post links, provided it is not to another fish forum.
This sand seems ideal. And I am pleased to see their information on their personal observations of the substrate in all habitats being sand...I can't see you having issues with this sand.
On the filter question, a canister in my view is pretty substantial for a smaller tank like this 120 liter. I assume it is no longer than 90 cm/36 inches length. You might consider a small internal filter, like the Aqueon Quiet Flow series. I had one of these in each of my 33g and 40g tanks, with cories and upper fish, and they were ideal.
Once again, thank you! I made a mistake in my original post. I actually bought the 200 litre / 55g version of the Lido. I don't know why I put 120.... It is 71cm long, 51 cm wide and ~ 60cm usable depth. They come with internal filters new but I bought mine second hand.
Once again, this is simply false. The following is from Wikipedia (the statement is references a science paper):All species of Corydoras require soft fine sand as the substrate.
The barbel issue is a myth. The reason some corydoras suffer from damaged barbels is due to poor water quality with high levels of bacteria. In any case, see the following links:It isn't. It is written in their genetic code to sift through sand. They are MEANT to do it. I have watched the behavior myself. They also love to dig...
If they do that in fine gravel or sharp sand, they can cut their bodies and barbels.
A sponge filter will work if it's fine enough. Filter floss might be better, or even panty hose which you can cut and wrap around the intakes. It also helps if you keep your intakes well above the sand, rinse the sand thoroughly before adding, and be very careful not to disturb it much when vacuuming.I also have shrimp so I was planning on covering the filter intake with a sponge. What filter would you suggest to cope up with sand?
All species of Corydoras require soft fine sand as the substrate. You've heard so many people said that. Even I can edit wikipedia...Once again, this is simply false. The following is from Wikipedia (the statement is references a science paper):
Corydoras are generally found in smaller-sized streams, along the margins of larger rivers, in marshes, and in ponds.[2] They are native to slow-moving and almost still (but seldom stagnant) streams and small rivers of South America, where the water is shallow and very murky. Most species are bottom-dwellers, foraging in sand, gravel or detritus.
I seriously doubt Wikipedia would allow you to edit anything. You seem to be an example of the saying "A little knowledge is a dangerous thing." You need to pay attention to my signature line.All species of Corydoras require soft fine sand as the substrate. You've heard so many people said that. Even I can edit wikipedia...