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Showing Visitor Messages 31 to 40 of 193
  1. hitmanx
    03-31-2014 01:59 AM - permalink
    So are you still selling your meters? What's the cost? And do you ship to canada? Are there similar alternative? Lux meters maybe?
  2. Hoppy
    03-30-2014 03:55 AM - permalink
    hitmanx, you can just prop the light across a couple of chairs and measure the PAR out in the air, at the same distance that they would be from the substrate. That reading will be very close to what it is in the tank, in water. If anything it is a big lower than what you get in the water.
  3. Hoppy
    03-30-2014 03:54 AM - permalink
    My PAR meter sensors are all waterproof, to the extent that a quick trip into the water shouldn't harm them, but they can't be left in the water for more than a few seconds without some risk of leaks.
  4. hitmanx
    03-29-2014 05:17 PM - permalink
    Both the 8.5in and 10.5in domes completely surround the Philips 23w 6500k cfl I am using so all available light is being reflected down. Are your par meters water proof? Could place them directly into my existing tank? I guess this is the only way I will actually know what kind of light levels I am dealing with
  5. Hoppy
    03-29-2014 04:52 PM - permalink
    Yes, I did some testing with at 10.5 inch dome reflector. But, I have not compared the light output from the two sizes of reflectors. It isn't an easy thing to figure out, because the smaller dome doesn't completely surround the larger wattage CFL bulbs, making it capture less of the stray light. Intuitively, the 8.5 inch dome should give a higher PAR than the 10.5 inch one, for small CFL bulbs which don't extend out of the dome profile. But, when a bulb does extend out of the dome profile there is a big loss of light.
  6. hitmanx
    03-29-2014 12:58 AM - permalink
    Okay that makes sense. So wont the larger dome spread the par even thinner then? So at the same height and same bulb the 10.5 would give less light per unit area than the 8.5?

    Did you conduct the tests that led to your vertical cfl chart for a 10.5inch dome? According to that I would have a par of 90...
  7. Hoppy
    03-28-2014 11:29 PM - permalink
    The higher you raise the light the larger the circle of light gets, so the lower the light per unit area gets. PAR is light per unit area. If you want to be sure to have low enough light, just raise it 2 inches instead of one inch. Then, if you still have difficulties with BBA you can either dose Excel at 2X the recommended dosage - or 2 ml per 10 gallons every day - or you can raise it another 2 inches. Without a PAR meter you can only do this by trial and error.
  8. hitmanx
    03-28-2014 08:52 PM - permalink
    After 4weeks small tufts of BBA are starting to show up on dying leaves at the bottom of tank, dwarf sag, and on the anubias petite. I removed as much as I could and raise raise the light 1 inch.

    Now my question is will a 10.5 inch fixture just extend the lighting footprint outwards or does it alter the available par values enough to warrant raising the light? The 8.5in is giving a spotlight effect with plants growing up and inwards.

  9. Hoppy
    03-01-2014 12:00 AM - permalink
    The algae that you want to look for is black brush algae, BBA, which will be black tufts on non-growing leaves, and on hardscape. As soon as you see any, remove it, and raise the light an inch or so. Keep doing that until either you see none, or the rate at which you see it is easy to take care of.
  10. hitmanx
    02-28-2014 05:17 PM - permalink
    Okay thanks for your help! I'll start there and tweak the height... what kind of things should I be looking for that would tell me to raise it? How quickly can algae bloom? This will be first tank in about 20years, so I just don't remember

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04:25 AM - PortalMasteryRy mentioned Hoppy in post Nutritional requirements of aquarium plants
...o lower levels. Hoppy: You live so close t...
03:32 AM - PortalMasteryRy mentioned Hoppy in post Nutritional requirements of aquarium plants
Hoppy: I've actually reset...
04:56 AM - Marcel G mentioned Hoppy in post Dosing system: Is it really needed?
...e of hobbyists. Hoppy, my goal with this e...
08:59 AM - Audionut mentioned Hoppy in post High nutrients promote algae growth and are toxic to aquatic life
...ferts is relevant. Hoppy was merely pointing ...
12:56 AM - Audionut mentioned Hoppy in post High nutrients promote algae growth and are toxic to aquatic life
Hoppy, yes that is what EI...
11:19 PM - dukydaf mentioned Hoppy in post High nutrients promote algae growth and are toxic to aquatic life
...very hour. What Hoppy says makes the most ...
02:46 AM - bassbuster23 mentioned Hoppy in post Excel & CO2
... both benefits that Hoppy stated.
03:26 PM - bassbuster23 mentioned Hoppy in post Cleaning your tank
Hoppy.....will the credit ...
05:27 AM - Nick00Merlin mentioned Hoppy in post 125H Gallon First Time Live Plant Project (Lots Of Pictures)
...resting experience. Hoppy has a lot of good in...
12:32 PM - bassbuster23 mentioned Hoppy in post Will this work?
...ssing towards also, Hoppy. Do go ahead - it...
09:14 PM - thedood mentioned Hoppy in post Types of Metricide question. Thanks Hoppy and bassbuster23
03:04 AM - Audionut mentioned Hoppy in post Wrapping my head around KH and co2. Led light questions! Look!
... Minor correction Hoppy. That would be Bica...
01:39 AM - Audionut mentioned Hoppy in post CO2, pH, and dKH question observation from Hoppy. The last paragraph...
02:32 AM - burr740 mentioned Hoppy in post Lighting an Aquarium with PAR instead of Watts
...hat one was made by Hoppy (thanks again man, i...


11:27 PM - The Big Buddha quoted Hoppy in post Questionable tank stand
...t about 200lb women Hoppy? Would that work too...
10:25 PM - Hoppy quoted Solcielo lawrencia in post High Light and Algae
High light alone does not cause algae, ...
10:11 PM - Hoppy quoted s_s in post Anyone seen a side by side comparison of CO2 vs non-CO2?
If your not going to do ...
10:08 PM - Hoppy quoted AWolf in post Chloramines
It does present well. How...
04:21 PM - AWolf quoted Hoppy in post Chloramines
The CDC (Centers for Disea...
11:22 PM - p2002 quoted Hoppy in post Many uses Siesta method, but what about TWO Siestas?
Ive often wondered what a ...
10:47 PM - bmckinney0727 quoted Hoppy in post GH/kh for plants
EI dosing now includes dos...
09:57 PM - Hoppy quoted burr740 in post Many uses Siesta method, but what about TWO Siestas?
Ive often wondered what a pe...
09:47 PM - Hoppy quoted fusiongt in post Low PH...Unsure Why!
Hmm this post has lots of stu...
09:34 PM - jeffkrol quoted Hoppy in post WPG for LEDs?
The reason why watts per g...
08:58 PM - Hoppy quoted mfield16 in post Metricide--Help!
Hate to bring up a dated thre...
02:28 PM - jr125 quoted Hoppy in post Low PH...Unsure Why!
[QUOTE=Hoppy;8852753]It has somet...
03:53 AM - Audionut quoted Hoppy in post Low PH...Unsure Why!
And, if you try to change ...
02:46 AM - Hoppy quoted Turningdizzy in post Low PH...Unsure Why!
Why does it seem that all of the ...
09:00 PM - Hoppy quoted Jaye in post Excel & CO2
I dose 20 ml of metricide...
08:22 PM - jjgloster quoted Hoppy in post What lights do I need?
First, that light is 2 fee...
11:05 PM - Hoppy quoted Alphazygma in post EI dosing but algae
Interesting, Thought EI was all...
05:14 PM - Hoppy quoted jcmv4792 in post Minimum PAR requirements for these plants - Anubias, Java fern, moss
So you can get away with 45 P...
04:50 PM - robchang quoted Hoppy in post PAR Data-Spiral Power Saver Bulbs, lighting question
...his thread i4x4 and Hoppy! I am revisiting th...
05:09 AM - Hoppy quoted The Big Buddha in post Considering starting Excel
Hey Hoppy, Is that 10ml of metr...

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