AllPondSolutions Fish Tank Filter, 700IF+ 9w UV Steriliser Internal Aquarium Water Filter for Small Coldwater or Tropical Aquariums for Tanks Up to 35 Litres – All in One 150L

I wanted an internal filter system for my aquarium that would circulate the water several times in a hour and contained a UV light. After looking at several options decided on this one as it ticked the boxes. After installing the unit in my aquarium and got it running I can say that it works a treat and performs really well. Water quality is spot on and the UV, so far, is keeping algae blooms at bay. It is good value and performs well against other more expensive units. Had small problem with the venturi not working as it should but with a minor modification is now fine. To sum up this unit is an excellent product and ideal for a medium sized aquarium.Update: Since installing this unit I want to bring to your attention a problem that has occurred. The UV 9w lamp in this unit gets so hot it is heating up the water in the aquarium and reached a dangerous 82f (28c). There was a steady rise in temperature,over a period time, that made me think my heater was faulty but after testing was found to be working ok. I guessed it must have been the UV lamp so switched it off and the temp started to drop. I overcame this problem by replacing it with a 5w lamp unit. So please keep this in mind.

I has a breakout of Green Algae making the water completely green and unsightly. I'd been on holiday and left a food block, which I've used without issue before, and my lights connected to a Hive plug as usual. There was a problem with Hive and the light was on 24-7 all week. I can only assume that was what caused the problem. I tried extra water changes and some water treatment chemical which improved it slightly but it wouldn't clear up.I bought this Steriliser after some research online and I can not believe how it has worked.Within 48 hours the water was crystal clear and I mean crystal clear... I am not exaggerating when I say that it is clearer than at any time since I've kept fish and tanks. I was honestly truly amazed. My tank has never looked this good.The filter unit is quite large in my 125l Juwel Rio but not overly and it is nto bad looking. I;ve placed it next to the Juwel internal unit. I will be keeping it in permanently where I had planned on just using it until the problem cleared up.Added benefit is the additional physical filtration via an easily cleanable sponge. Also provides bubbles near the surface which is good.Fish are happy, I am very happy! Well done All Pond for such an amazing product.------------------Update Sept 2020I took the filter out for a while as I didn't think I needed it any more, the Jewel filter system works perfectly well... however. I suddenly noticed the water getting a little milky and then green. I put the Steriliser back in again and over a period of 3 or 4 days the water was clear again. It really does work. I've included some before and after pics now.

THE PUMP IS QAMAZING , THE UV BULB DIDNT LAST , BOUGHT IN MAY AND BLOW. BUT THERE IS THE OTHER PROBLEM, FITTING THE NEW BULB , NO PROBS REMOVING OR FITTING THE NEW BULB BUT WHEN YOU SWITCH ON - NOTHING, PLAY WIITH THE ON/OFF A FEW TIMES, EVEN STRIP IT ALL DOWN AND REFIT IT ALL BUT NOPE NOTHING , WASTED £10 ON A NEW BULB FOR NOTHING. contacted allponds and they have been very helpfull and the solutioon has been found.

Complete waste of time.As soon as I opened the box I tested the bulb. I didn't work. There was nothing obviously wrong that I could see and weirdly, the bulb indicator light came on but the UV bulb did nothing. I thought I'd try it in the water anyway. I assembled the unit and gave it 24hrs in the tank. The bulb indicator light was on but eventually it went out. The pump worked fine but no UV. I disassembled it and could see no problem other than moisture trapped around the seal of the bulb protection housing which surely should not have been there. However, inside the protective sheath the bulb was dry. It made no difference either way because even before I tried it underwater the UV bulb didn't light so the whole experience was a complete waste of time.I sent it back and got a full refund. However, I was a little suspicious that the example I received was actually a returned item. It arrived two days early and was slightly scratched on one side. I can't be sure but it did make me wonder just how many people buy these filters and see that the UV bulb indicator light on and then wrongly assume it's working. If your water doesn't clear up you could easily assume that the unit was working fine when you first purchased it so rather than send it back you end up ordering a new bulb instead.The worst part about the design is the fact that the UV bulb indicator light doesn't seem to have any barring on whether the UV bulb is actually on or off. However much you want to trust that little violet indicator light you can't. It's meaningless.I still have green water but rather than try another one of these I've ordered a Fluval UVC In-Line Clarifier instead. More expensive but way more reliable.