wpg calculation - The Planted Tank Forum
Old 05-26-2004, 12:08 PM Thread Starter
Planted Tank Obsessed

Join Date: May 2004
Location: Athens, Georgia
Posts: 328
wpg calculation

When calculating wpg, do you use the nominal tank size or the actual volume? With the nanocube it makes quite a bit of difference as its listed as a 12 gallon, but actual volume is closer to 8 gallons...
zapus is offline

Old 05-26-2004, 12:39 PM
Wannabe Guru

Join Date: Jan 2004
Posts: 1,261
Wpg rule of thumb won't apply on smaller tank anyway. My 10gl planted has around 5wpg .

Eheim Pimp #21 (2) 2028 and auto feeder
ninoboy is offline
Old 05-26-2004, 01:10 PM
Planted Tank Enthusiast

Join Date: May 2003
Location: Blackwood South Australia
Posts: 644
I think that nominal tank volume is used in the watts per gallon rule, but as nino boy infered the rule is only a guide.

Paul

Eheim Pimp Club member #3: Scribe to the Eheim Pimp Club

90 gallon, CO2 dupla injection, Dupla substrate heating, Dupla Laterite with iron stone substrate, Aquastarlight future 3 x 150 metal Halides, Eheim 2026 pro2's and heavily planted with Discus
rumples riot is offline
Old 05-26-2004, 02:13 PM
PT Biologist

Join Date: Oct 2003
Location: Maryland USA
Posts: 3,216
We don't worry about the 'actual volume' of the tank when filled with fish and rocks and substrate and such. Like Paul said it is more of a guideline. The problem is that it isn't really the volume we are worried about but the area and depth (which calculates into volume, yes I know). You want sufficiently strong light spread completely across the area of the bottom of the tank. This is in turn inhibited by the depth (sort of). There is a falloff of available light from a lightbulb as you move away from the lightbulb. The water isn't really deep enough to compound this problem in most of our tanks, it is just a failing of the type of light source.

Sean

Aquascape? I'm a crypt farmer.

It's a fine line between fishing and standing on the shore looking like an idiot.

That IS an aquascape, it's titled "The Vacant Lot".
SCMurphy is offline

Message:
Options

## Register Now

In order to be able to post messages on the The Planted Tank Forum forums, you must first register.

User Name:
OR

## Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.