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Showing Visitor Messages 41 to 50 of 198
  1. hitmanx
    03-28-2014 11:58 PM - permalink
    hitmanx
    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...
  2. Hoppy
    03-28-2014 10:29 PM - permalink
    Hoppy
    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.
  3. hitmanx
    03-28-2014 07:52 PM - permalink
    hitmanx
    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.

    Thanks
  4. Hoppy
    02-28-2014 11:00 PM - permalink
    Hoppy
    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.
  5. hitmanx
    02-28-2014 04:17 PM - permalink
    hitmanx
    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
  6. Hoppy
    02-28-2014 03:18 PM - permalink
    Hoppy
    I used the data from i4x4nMore, which I plotted on log-log graph paper to make extrapolating easier. I suggest starting with the light at the top of the tank, but being ready to raise it a couple of inches if necessary. I stopped making PAR meters, from boredom. I'm still looking into the possibilities of using the process described in http://www.plantedtank.net/forums/sh...d.php?t=453225 to make more of them, with less boredom.
  7. hitmanx
    02-28-2014 12:12 PM - permalink
    hitmanx
    Sorry, I don't mean to to be a pest, but I'm trying figure out how high to hang the light to achieve upper low light par. At what height do you think it would be 40par? Which one of your charts did you use to get get to that answer? Can I assume the lower numbers chart you made and the one i4x4nMore or more realistic? I just need a ball park so I have somewhere to start from and tweak... are still selling par meters?
  8. Hoppy
    02-28-2014 03:51 AM - permalink
    Hoppy
    I think you will get around 40-45 PAR, which is low medium light.
  9. hitmanx
    02-28-2014 01:39 AM - permalink
    hitmanx
    thanks for the reply. in my case i want low light, and my tank dimensions are 13x13in surface area, so i currently have a 23w daylight in a 8.5in dome and the bulb does NOT stick out... in the mean time, based on your previous experiments, which chart should i be using?

    thanks again
  10. Hoppy
    02-27-2014 12:48 AM - permalink
    Hoppy
    When there was big disagreement about how much PAR one of those bulbs would give, there were 3-4 of us making measurements, and making various errors in doing so. Plus, we found that a bigger CFL bulb that would stick out of the dome reflector would give significantly less PAR, and we were mostly using 8.5 inch domes, not 10 inch ones. With the 10 inch dome the bulb doesn't stick out, as I recall, but with the 8.5 inch one it does. I haven't revisited that subject since then, but I have planned to do so sometime.

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    Hoppy

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  Mentions

01-15-2016
01:46 AM - bassbuster23 mentioned Hoppy in post Excel & CO2
... both benefits that Hoppy stated.
11-30-2015
02:26 PM - bassbuster23 mentioned Hoppy in post Cleaning your tank
Hoppy.....will the credit ...
11-19-2015
04:27 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...
11-16-2015
11:32 AM - bassbuster23 mentioned Hoppy in post Will this work?
...ssing towards also, Hoppy. Do go ahead - it...
11-12-2015
08:14 PM - thedood mentioned Hoppy in post Types of Metricide
...my question. Thanks Hoppy and bassbuster23
10-30-2015
02:04 AM - Audionut mentioned Hoppy in post Wrapping my head around KH and co2. Led light questions! Look!
... Minor correction Hoppy. That would be Bica...
10-16-2015
12:39 AM - Audionut mentioned Hoppy in post CO2, pH, and dKH question
...is observation from Hoppy. The last paragraph...
10-03-2015
01:32 AM - burr740 mentioned Hoppy in post Lighting an Aquarium with PAR instead of Watts
...hat one was made by Hoppy (thanks again man, i...

  Quotes

03-26-2016
06:18 PM - Hoppy quoted Seattle_Aquarist in post Inline atomizer mod
Hi greenseeker, I would proceed with...
06:11 PM - Hoppy quoted Nlewis in post Did I waste my money on a drop checker?
I jad a second drop checker...
01:28 PM - goodbytes quoted Hoppy in post Light Coverage on 18" Deep Tank
A single Finnex Planted Pl...
12:27 PM - kanishkster quoted Hoppy in post Need advice on algae control
and keep raising the light...
03-25-2016
08:35 PM - Hoppy quoted lksdrinker in post Automatic Water Changing System
LOL.....thats not a "problem"! ...
03-24-2016
09:59 PM - lksdrinker quoted Hoppy in post Automatic Water Changing System
A problem with auto water ...
07:52 PM - GrampsGrunge quoted Hoppy in post What type of fish are Glofish?
I would settle for a cat t...
07:51 PM - Hoppy quoted Doogy262 in post Automatic Water Changing System
Seems like more work and effo...
07:44 PM - Hoppy quoted SpaceLord in post What type of fish are Glofish?
Are the glowfish light just bl...
05:44 AM - D.Farci quoted Hoppy in post Lighting for 33 Long Suggestions
A 30 inch long Finnex Plan...
02:59 AM - lnstevens quoted Hoppy in post Co2 Help
You may need new needle va...
03-22-2016
07:14 PM - Hoppy quoted Optix in post Help a member out
even when i ran them low a...
03-21-2016
08:02 PM - Padres1234 quoted Hoppy in post What culprit am I looking for?
Not all plants grow rapidl...
04:01 PM - Hoppy quoted kanishkster in post Need advice on algae control
Thanks Hoppy. I kept the lightin...
06:03 AM - rmsalaysay quoted Hoppy in post How munch urea to dose?
But, we don't dose potassi...
03-19-2016
07:28 PM - paperlilies quoted Hoppy in post pH, GH, KH issues!! Help!
You are adding only 2.5 ga...
03-16-2016
04:35 AM - Hoppy quoted Complexity in post Can you ship a plant without it dying? Zip lock bag with water or other procedure?
I wonder if the heat from the c...
03:35 AM - archangelvk quoted Hoppy in post Please help me im so confused
There is no way to know ho...
01:19 AM - GrampsGrunge quoted Hoppy in post Question about water parameters
Water companies treat wate...
03-15-2016
10:09 PM - Vidikron quoted Hoppy in post CO2 Test Kit
When I first started using...

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