DENNERLE Nano Gravel Cleaner

Works perfectly with my 64ltr tank, just the right size. So easy to use and control the flow of water. I tried a few of the cheap ones and hated them but this one is quality. The tube is nice and narrow for getting around the small spaces in between ornaments and plants, it's probably around 15mm. It comes with a little tube clamp for controlling the flow but I found the flow without it to be just right and gives plenty of time to work your way around the tank. Well worth the extra money. Even comes with a handy bucket clip.

After a couple of less successful attempts I got the hang of it and now couldn't do without it. A bit pricey however it is a good quality well made Dennerle product, it can be fully dismantled for cleaning and will last. Perfect to carry out routine cleaning and water changes. The long tube reaches all the way down and the consistent suction gently cleans the gravel of all debris without uprooting or disturbing the plants in my nano cube.

This is by far the best gravel cleaner for small tanks that I've ever owned. Main points in no particular order: - Easy to start the syphon first time every time - No up-and-down thrusting required, meaning no tsunami waves bouncing round the tank - Plenty of time to hoover because the flow rate isn't manically fast - In my test it took 10 minutes to syphon 10 litres i.e. flow is 1 litre a minute - Nozzle is really small for getting into the tight spots - Suction power comfortably enough to pick the lighter muck you want out the tank - Gravel usually only goes 30-50% up the tube before falling back - Bucket clip works a treat. Had no accidents - Easy to take apart and clean I was initially worried the nozzle was too small to clean all the floor during a water change. However, the flow rate gives enough time for no-rush, precision cleaning of gravel and decorations An unexpected killer feature is it drains difficult-to-access compartments near bone dry - to a few millimetres depth or so. That's because its small nozzle maintains the pressure and keeps on sucking even if the depth is 5mm or so. Evaporation can then take care of anything that's left.. If you are wanting to do a fast water change then this is not your tool - it's quicker to scoop the water out with a jug. Otherwise, there's nothing to beat this device for thoroughly cleaning a Nano tank.

So far quite impressed, well except for the price for what amounts to a few bits of plastic. I mean the mark up of this must be huge! That said it IS well designed, fits easily in my hand and starts easily. I dont mind sucking to start a syphon - there is a knack to not getting a mouth full of water - but I really appreciate the ease with which this starts . . . its a far cry from those that purport to start by moving them up and down in the tank but which never do unless you really want to risk freaking out your fish and sloshing water everywhere! Anyway I've held off giving 5 stars because I want to see how this lasts and because I think it is a bit over priced, a tenner would be fairer and I'm sure still provide a huge profit.

This gravel cleaner is really excellent for smaller tanks. I've used various cheapies and always found them okay so I was sceptical that this item would be worthwhile. Genuinely though if you have a small tank, it is very worthwhile. The clip allows you to control the speed of the syphon so you don't suck your sand up. The bucket clip is self explanatory but surprisingly useful. The starter mechanism is easy to use and doesn't cause the water to slop around in the tank. Finally it can be completely dissembled to clean. Very very thoughtfully designed product.

No bad product.

I got mine half price as damaged in the Amazon WHS, and I can't complain. works really well, suction is not super quick so you don't end up emptying your tank too soon - still figuring out the best way to use it, but when you press it into the gravel just right a big massive cloud or detritus comes up and its very satisfying to see. We have 30L nano tank with shrimp, and the suction is controlled well enough that I can get a decent bit of cleaning done whilst only emptying 10% of my tank, which is the maximum we do at once. Not too strong to suck up the shrimp, which is a plus. Also a bit annoying as there is too much water stuck in the tubes after you lift, and even when you try to make sure it's all drained there seems to be some left in the middle bend, and I ended up pouring a bit of water out accidentally even after I tried to shake it all off. Overall though I would really recommend it, especially if the price comes down, but for what it is £30 normal price is a bit on the high side.

Ideal gravel cleaner for small and medium sized aquariums. I use mine on my 60 and 120 litre tanks, the 60 litre is a Dennerle Nano Cube and 43cm deep, the 120 litre is a Juwel Lido and 58cm deep. Enough suction to suck up old food and algae but not too much that it disturbs the substrate too much. Can be taken apart to clean it out (if larger particles clog it), and isn't powered so is easier and less complex in its workings. Tried several (and even made my own) but this simple gravel cleaner is now all I use.