PAR throughout aquarium?

CHOMPPPPP · 02-02-2013, 01:57 PM

I have a 20g long. pressurized co2. rootmedic tabs. macro & micro dosing. not heavily planted. Just an ozelot sword and vals for now. 2xt5ho Catalina fixture suspended 27'' above substrate, which I previously had it at 18" above substrate a week ago. Ive read hoppys chart, excellent job. However I am having co2 issues at the moment, very slow/stunted/disformed growth. I cannot raise those levels anymore or fish suffer. I am wondering if I should use hoppys chart to aim for a certain par at the substrate, at the top of the tank, in the middle.

Steve001 · 02-02-2013, 04:08 PM

post a photo please

**Hoppy** · 02-02-2013, 08:54 PM

The charts are all based on PAR at the substrate. For low light, that means around 20-30 micromols of PAR at the substrate. The higher in the tank you go, the higher the PAR, and near the ends of the tank, the PAR might be a bit lower. We can't independently set the lighting for a specific PAR at more than one place in the tank, so I chose the substrate, near the middle of the tank, as the place to measure to rate lights.

CHOMPPPPP · 02-02-2013, 10:10 PM

Cool. thanks for the quick response. I plan on posting pics when i get some free time. hard to do with 2 jobs and a family if u know what i mean

02-02-2013, 01:57 PM	#1
CHOMPPPPP Algae Grower (View User Tanks) PTrader: (0/0%) Join Date: Jan 2013 Location: Ames, Iowa Posts: 6	PAR throughout aquarium? I have a 20g long. pressurized co2. rootmedic tabs. macro & micro dosing. not heavily planted. Just an ozelot sword and vals for now. 2xt5ho Catalina fixture suspended 27'' above substrate, which I previously had it at 18" above substrate a week ago. Ive read hoppys chart, excellent job. However I am having co2 issues at the moment, very slow/stunted/disformed growth. I cannot raise those levels anymore or fish suffer. I am wondering if I should use hoppys chart to aim for a certain par at the substrate, at the top of the tank, in the middle. __________________ If you do it fast enough then you will have time to do it again

02-02-2013, 08:54 PM	#3
Hoppy Planted Tank Guru (View User Tanks) PTrader: (54/100%) Join Date: Dec 2005 Location: Sacramento, CA Posts: 17,215	The charts are all based on PAR at the substrate. For low light, that means around 20-30 micromols of PAR at the substrate. The higher in the tank you go, the higher the PAR, and near the ends of the tank, the PAR might be a bit lower. We can't independently set the lighting for a specific PAR at more than one place in the tank, so I chose the substrate, near the middle of the tank, as the place to measure to rate lights. __________________ Hoppy

02-02-2013, 10:10 PM	#4
CHOMPPPPP Algae Grower (View User Tanks) PTrader: (0/0%) Join Date: Jan 2013 Location: Ames, Iowa Posts: 6	Cool. thanks for the quick response. I plan on posting pics when i get some free time. hard to do with 2 jobs and a family if u know what i mean __________________ If you do it fast enough then you will have time to do it again

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

02-02-2013, 04:08 PM	#2
Steve001 Wannabe Guru (View User Tanks) PTrader: (0/0%) Join Date: Feb 2011 Location: Baltimore Maryland Posts: 1,033	post a photo please