25 inches above the substrate (11 inches above the top of the tank) looks about right to get 80 micromols of PAR at the substrate using 2 bulbs in your Catalina 3x39 T5HO fixture.
ODNO T8 output increases over normal T8 (from GulfCoastAquarian's ODNO thread):I have read a lot about T8/T12 vs T5HO but found little info on overdriven T8 vs anything.
If 1 [email protected]" is ~10par, 1 T8ODNO 2x would yield ~15par, 3x would yield ~17.5par, 4x would yield ~20parSo assuming 1 [email protected]" gives ~10par, 1 T8ODNO 2X would yield ~20par. If I also assume that 1 T5NO gives about half the par of T5HO, I would get [email protected]" for T5NO.
The T5NO would yield ~10par more over the T8ODNO, that's not a lot but it gets onto the low light range(barley) for 20" depth.
Does this sound right?
I think HolyAngel deduced that the Aquasun bulb doesn't penetrate beyond ~20" in the Current fixture because the PAR readings with the Current 10K bulb only and the PAR readings with the Current 10K + Aquasun are the same starting at 24". It does look like the Aquasun isn't contributing any PAR from 24" on when considering those PAR readings.If it isn't "penetrating" beyond 20 inches why does the PAR meter read 14 at 36 inches?
Usually measured at the substrate level. Dang, Hoppy beat me to it, and has a better answer. :icon_smilhey guys, quick question. is the microlmols measured at the bottom of the tank or at the tank when determining the intestity of the par?
Depends on the type of T5HO fixture (ballasts and reflectors), the output can be highly variable between different ones. Again, see Hoppy's reply also :tongue:so if was going to run 4 36" t-5 HO's 39w each for a total of 156w..... would the be enough for a planted tank in my 150g 72L"x24H"x18D????
Probably low light but depends on the reflectors in your fixture.i have a 55 gallon tank(21 inches tall with 4 inches of substrate). i have 4 26 watt t5NO bulbs. 2 colormax 2 daylight. the fixture sits directly on my tank. what kind of plants can i grow, or where does my system rate on this scale.i am fairly new to this but am doing ok.
I was thinking of using this LED for a 23 gal tank, total depth would be 45cm (or 17.7"). I calculated that would be approximately 90 PAR for the middle of the tank, on the substrate. Would this be considered high, med or low lighting? Also, this is a marine LED, would that work for a freshwater application?
i was wanting a low mantaince tank, and really dont want to run CO2 but if i have to then i would run some sort of DYI style. i will have some live plants but nothing that will require high light. the reason i ask is because i can get
2 bulb T5 HO bulb set-up for 78w for only $49. i was going to get 2 of them to take up the 72". i cant seem to find anything scheaper.
its aqueon, there are 2 fixtures with 2 bulbs, one colormax,one daylight in each, i add bottled co2 as of now, tried the yeast way did not like it, causes a white film on the glass.im growing ambulia and crypto wendtii at rapid rates(i am giving away ambulia, with a warning not to introduce into the wild) altelanthrea growing very slowly(roots growing out of stems), and microsword and dwarf hairgrass are alive but not growing.if i were to invest in more light, should i get 2 more of the fixtures i already have or invest in t5ho?(with the ones i have, i work at a petstore and get them at a discounted rate)...where would be a good place to buy better lighting from?
True, I found out it was that fixture by using the url of the chart exv152 linked in his post. :icon_mrgr And yes the double bright version could work, the reef-capable version might need to be suspended above the tank.The Marineland double bright light should work well for that tank. The word "LED", light emitting diode doesn't mean "light fixture using multiple light emitting diodes" - that's what fooled me
The reef-capable light is very strong for a shallow tank like yours, like I mentioned above it may need to be suspended above your tank. You may want to go with the double bright instead as Hoppy suggested and still use CO2, plants will grow slower, but it will be easier to manage.Thanks Hoppy. My intent is to setup a med-high tech setup with pressurized co2, ferts etc, but I wasn't sure if the light would be strong enough.
Also, not sure about the different colours that are emitted from these marine-type fixtures, and whether or not it'll suit my planted tank.
Here are a couple of other options to consider:So, I'm setting up a 20 H and I'm trying to choose between the following:
The AquaticLife seems to have the best reflector (Coralife worst?). Thoughts on the quality of these and the amount of light expected?
Here is another option:
Which do folks prefer?