hmmm.... - Page 2

StirCrazy · #11 08-26-2003, 04:59 AM

Quote:

Originally Posted by Samw

As of yesterday, I'm at 147.

Hopefully my acros will brighten up and stop dying now with my new VHO Super Actinic bulb and increased water flow.

31.7 w VHO actinic / sq ft
32.0 w PC 50/50 / sq ft
83.3 w MH / sq ft

yup thats why I don't go for this way of comparason either, but it is better than /gal

the problem with comparing with surface area is that it tells you nothing about actual intensity at a given point in the tank.

for instance I could put 400 watt ushio MH bulbs on normal ballasts on my tank and bump my total up to 165 watt/square foot but I would actualy have less light at any given point in my tank as the PAR output is lower on the 400 watt ushio than I obtain on my 250 watt HQI (this is not speculation but actual measured values.)

so you can see why it is hard to go by any measurment that uses watts.

Steve

StirCrazy · #12 08-26-2003, 05:00 AM

oh Sam, how is that purple digitata doing?

Steve

ryan_p · #13 08-26-2003, 05:05 AM

Steve am I correct to assume that I have 48 W / sq. ft. based on my demensions given earlier and pc wattage?

StirCrazy · #14 08-26-2003, 05:07 AM

some whare between that and 60 because of the bow.

Steve

Samw · #15 08-26-2003, 05:22 AM

Quote:

Originally Posted by StirCrazy

oh Sam, how is that purple digitata doing?

Steve

Doing better than a few days ago. I was moving it around too much. I change things in my tank weekly. It was getting nice purple tips and then after I moved it, the polyps retracted and the coral turned quite white. The polyps are coming back out now but its brown. I expect it to turn purple again once it has stabilized in its new location.

ldzielak · #16 08-26-2003, 05:42 AM

Ryan just to confuse you some more, you were looking at my tank while I was gone, I have a total of 570 watts over that main tank. With a 57 watts sq/ft. But as you know most of my corals are in the top 6" of the water, directly under the MH lights.

Lee

EmilyB · #17 08-26-2003, 05:43 AM

Anemones do better with actinic supplementation. IMO and according to Joyce Wilkerson.

Samw · #18 08-26-2003, 07:36 AM

Quote:

As of yesterday, I'm at 147.

Hopefully my acros will brighten up and stop dying now with my new VHO Super Actinic bulb and increased water flow.

31.7 w VHO actinic / sq ft
32.0 w PC 50/50 / sq ft
83.3 w MH / sq ft

Here are 2 pics with all 3 lights on. Pics taken under different camera shutter speeds to allow more exposure in 1 pic than the other.

You can see the MH in the center. Directly behind it at the same height is the 50/50. Below that at the top of the tank is the VHO actinic. The clip-on fan is on the right.

MORE

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