Stoopit Green Killing Machine

I have that GKM, the little sponge prefilter thing clogged very fast sometimes. Could it be that? I only used mine for a couple months.

FWIW,
I recently purchased a used CurrentUSA Gamma 25W on ebay for ~$60, supposedly used less than 6 months. Bulb seems fine, I had to clean up some light deposits from the quartz glass tube(which took 5 minutes). I'm using a penguin 660r powerhead ($20) to move the water through. It's mounted horizontally, HOB-style. All I had to add was short piece of tubing to go between the two.

The lamps are still $45-50 each, but it seems a bit better built than the GKM, IMHO

With the large sponge prefilter on the 660r I should have no clogging issues. I've been using 660r's for years and they work well.

are you running all 4 of your 65watt bulbs? That may be the soure of your green water if so and also depending on how many hrs your running them and how heavily planted the tank is. If you have all low light plants I'd take 2 bulbs out. Goodluck with it.

Ive had 1 for over a year .Only changed the bulb once....Is the red led on or off?

I now use the Sunsun 9w UV sterilizers, much simpler all-in-one unit, much better adjustable power head and much cheaper and easy to chnage bulbs ($9), for about 1/2 the price ($26).
http://cgi.ebay.com/9-WATT-UV-CLARI...343?pt=LH_DefaultDomain_0&hash=item2c58d81987

Don't get me wrong I still use the GKM I have on hand, but I am phasing them out as the fail. The weak link for me with the GKM is the little controller box that sits outside the tank but is not even O-ring water resistant. So any little splash of water on the box or dribble of water that works its way down the power line to the box seeps into the box seam molding and shorts out the electronics, and there is no replacement part for the controller box. Its a great UV sterilizer, just too may separate components that are both inside and outside the tank requiring too many susceptible connections.

The simpler unit below has performs just as well but is simpler with fewer parts all contained in one unit yet very accessible. Also more functional with a bubble spray adjustable power head that adjust both intensity and direction, and the filter is much larger. I recived 2 replacement bulbs for tha work great from Hongkong for $19 shipped.

CWO4GUNNER said:

I now use the Sunsun 9w UV sterilizers, much simpler all-in-one unit, much better adjustable power head and much cheaper and easy to chnage bulbs ($9), for about 1/2 the price ($26).
http://cgi.ebay.com/9-WATT-UV-CLARI...343?pt=LH_DefaultDomain_0&hash=item2c58d81987

Click to expand...

Here is who I get my bulbs from as Kool-Goods wants $14 (too much). I have bought 3 total so far from idealhere-ca-alfa and have had great service. After I bought the 1st one that came from Hongkong, I decided to make an offer on 2 more for only $18 shipped and they accepted and arrived in 8 days by mail well packed and fit perfectly, I have stored as spares.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170539743090&ssPageName=STRK:MEWNX:IT