TAISHAN Aquarium Clean Light，15 W Submersible Light with Timer,Double Tube Aquarium Water Clean Green Clear Waterproof Clean Lamp for Pond,Swimming Pool,Indoor

i like this product

Very bad quality , broke on 2 day use

UV sterilizers are *part* of the approach to control excess algae or bacteria in your aquarium. I highly recommend you address why the algae or bacteria bloom happened in the first place. Otherwise, it'll come back the moment you remove the UV light. And you may be putting a band-aid over a problem (such as excess nutrients) that may be bad for the fish.Bacterial blooms can happen when the balance of microorganisms get out of balance: phase of a newer tank becoming "cycled" or when those beneficial bacterial colonies get really disturbed such as a big cleaning plus filter media replacement. Bacterial problems and white cloudy water can also happen as a shorter phase following excessively disturbing gravel. When cleaning the tank, try not to overly disturb gravel. If you're doing under ornaments, do only one or two each time you vacuum. When refilling: pour new water in gently.Algal blooms: overgrowth happens with excessive nutrients and/or excessive light. Keep tank light off, if possible. Close blinds of window, if nearby. Nutrients: don't overfeed. Do water tests to see if your tank is "cycled" and that nitrates aren't excessively high. Do partial water changes to manage high levels of the nitrogen waste products (ammonia, nitrites, nitrates). Address deficiency in your nitrogen cycle (the beneficial bacteria) if you're getting anything but zeros for ammonia & nitrites. Don't over-fertilize, if you have live plants. Do use lots of live plants because they compete with algae for nutrients.Brown dust "brown algae" aka diatoms: may overgrow as a newer tank is becoming cycled and some things aren't yet in balance. Usually it's just a phase, unless the tank's nitrogen cycle keeps getting disrupted.PROS: good price for a submersible UV aquarium light. Comes with suction cups to hold it in place. More powerful than some models. Easy to use. Has timer.CONS: any exposed UV light needs to come with big warnings not to use in a tank when there are fish or other animals present. The UV light cannot shine on them; it can hurt or kill them. This model is to be installed in a filter compartment or sump tank. Or you may use it in the tank, if all fish/snails/shrimp are removed and you may even want to remove live plants. I use it in an empty compartment in a hang-on-back filter. Remember, it will kill beneficial bacteria, too, so don't use it up against filter media. Because it's a little taller than any of my HOB filters, I used a piece of aluminum foil as a cover to keep the light contained.

Light seemed to work well and functioned until light touched water and stopped working immediately. Controller smoked and it was clear it packed it in. Be careful to only supply 220V Power. Not suitable for AC power in countries like Australia where 240-270V is standard. Needed a currency converter to DC or max 220V and still blew when light touched water. Temperature intolerance or bad waterproofing expected cause. Item may have been faulty or damaged example of product.

I have a small pond 6’ by 6’ by 3’ I have it on the waterfall where the water runs over it. It is controlling the algae so far. We haven’t had any hot weather yet so that is yet to see. I’m very happy with it so far.

Purchased two of these back in May for my two indoor hydroponic garden systems that had been disconnected since some home renovations had started earlier this year following last year's Hurricane Ian. I finally got the chance to set up my systems again this morning; I realized I was going to have to cut a hole in each tank lid in order to run the wire, but it would be worth it, right?!!Not so much.After cutting said hole, I plugged in the light, watched the red lights on the display come on and flicker up and down the display, and I set the timer for three hours. Not five minutes later, I hear sizzling coming from the electrical box on the unit and it starts smoking from under the plastic casing. Smelled like burnt plastic and electricity. I unplugged the power strip and then unplugged the unit, then removed it from the setup. When I picked up the unit's timer box to put the whole thing in the trash, the box was still incredibly hot.I don't know what happened to that one but I ended up throwing the second one in the trash without even trying it. I'm glad I was home to see that happen - I don't know what would have happened if I wouldn't have been home to unplug it, so I'm not taking the chance.Really bummed that this didn't happen during the return window, because I'm out fifty bucks now for two units. Big disappointment.

This helped but didn’t mitigate the issue. We could have left it on longer but when does it cause problems to the fish?