Forums / Pond Forum / General Pond Discussion / U.V. light to kill the green / Latest Posts

RE: U.V. light to kill the green

argi — Sat, 07 Jun 2008 17:03:31 GMT

The sterilizer should be a close unit that does not shine into the tank, so I think it may have just been a coincidence that the coral had issues after hooking up the sterilizer. Or maybe there was something on the pump or sterilizer that caused issues with the corals? I have never heard of a UV causing issues with corals themselves.

But to answer your question, yes there are ones that don't "twist" the water around the UV light. I personally like the AquaUV sterilzers. You pay a little more for them, but the quality is much higher and customer service from the manufacturer is top notch.

HTH,

RE: U.V. light to kill the green

Reefski — Sat, 07 Jun 2008 14:48:14 GMT

??? what. the UV only kills stuff as it passes by the lamp in the pipework.

RE: U.V. light to kill the green

AboutMyReef777 — Sat, 07 Jun 2008 11:19:22 GMT

To long exposure to the light, or to less exposure to the UV light itself, hmmmm

RE: U.V. light to kill the green

Reefski — Fri, 06 Jun 2008 20:33:40 GMT

what would the mechanism be that almost killed your corals? the UV will only kill things as they pass by it in the water column, and not all of those even.

RE: U.V. light to kill the green

AboutMyReef777 — Fri, 06 Jun 2008 20:27:44 GMT

Keith, I have bought UV light from Marine Depot, or did I buy from local store can't remember, anyway, Bought a 3X 9W Turbo twister. Well something that happen was the amount of flow that was going through the unit. Now if the thread post oe. is talking just fish only tank, maybe no problem. But I even put valve before unit to control flow with a little 300gph pump. Did all the head pressure loss cal. And approx: valve cut down flow. Well something that caught my eye was when installing the light itself when bought new, was the inside of the chamber housing the three fins that is machined in a swirl spin vortex look three times, hints the name 3X. Well isn't that product designed to slow down the flow three times before it leaves the unit, exposing it to the light longer? Why I ask this is because when I hooked up, the flow to unit was about 195gph and dang near killed all my corals. Are there other UV units on the market designed different, like just straight through housings?

See ya

RE: U.V. light to kill the green

argi — Mon, 28 Apr 2008 05:36:41 GMT

Hi Mike,

Welcome to the Marine Depot Forums.

I apologize for the delay in replying. UV filters will work better with a prefilter before the water goes through the unit, but they can run without this prefilter. You will just need to make sure you are cleaning the quartz sleeve more often.

The flow of the water through the unit needs to be within the manufacturers specs. Going to fast through the unit will not allow enough contact time with the algae cells and the UV light and therefore not kill the algae.

HTH,

U.V. light to kill the green

justmike — Tue, 22 Apr 2008 16:42:38 GMT

I have a small(75 approx) outdoor pond with 4 small goldfish that I can barely see 'cause of algae. Do I really need a filter in front of the U.V. unit for this small a setup? Also, is there a problem with a pump being too powerful for the size of the U.V. light? Thanks in advance for a response