my inside tank real water volume calculation?

[geaux xman]

My tank to be delivered is 60x30x23 with 3/4" glass. Which would be 179.2gal .

if i subract the glass would this be closer to my real water volume(not taking account rock displacement)?

60-(3/4" + 3/4") due to each side of the glass = 58.5"
30 - 1.5"(front and back glass at 3/4"
23 - 3"(1.5"sand + 1.5" water line)

so would my real water volume be closer to

58.5x28.5x20 ??


58.5x28.5x20" = 144.4gal real inside tank water volume

http://reefcentral.com/index.php/tank-volume

 

[spieszak]

For my personal curiosity, why?
I mean, if it's just curiosity then that makes sense, but the +/- for the glass really seems like a meaningless calculation since the (highly specific)actual water volume isn't really used for anything?

 

[geaux xman]

I didnt mean to get techincal, but i'm just curious also. Its almost a 35gal difference, which is fairly significant. Most of that is due to the sand depth and water line.

Factor in rock, the almost 180gal might be closer to 130gal of real water volume.

 

[spieszak]

ahh.. cool.. since it's a new tank it would be kind of interesting to see if someone who's smart enough to do the actual calculation could get close, since you could measure the water as you add..
I mean, if you wanted to "play the game"..kinda like guessing how many jelly beans are in the jar.. You should see if you can get your tank builder to sponsor it, and give out a 10% discount to the winner! (ok, I know that won't happen.. but I'm bored this morning waiting for football to start)

 

[albano]

if i subract the glass would this be closer to my real water volume(not taking account rock displacement)?

60-(3/4" + 3/4") due to each side of the glass = 58.5"
30 - 1.5"(front and back glass at 3/4"
23 - 3"(1.5"sand + 1.5" water line)

what about the 3/4" bottom glass?
58.5" X 28.5" X 19.25" = 138.9g

Is there an internal overflow?, further reducing water volume!

 

[The_Codfather]

Add silicone to the list too

 

[noahm]

If you really wanted to get close, you could fill an incrementally marked bucket half full. Before you add a rock to the tank, put it in the bucket and however much water over the halfway line you go is how much you need to subtract for that rock and so on. Still seems like a lot of work for not much reward.

Also, sand is not solid. A decent amount of water can fit in there.

If you really want to to get crazy, use a double integral and nasty profile equation.

 

[AwkwardParrot]

Rock, sand, other equipment, and technically any fish/invert/coral in the tank and keep reducing as things grow......

 

[geaux xman]

what about the 3/4" bottom glass?
58.5" X 28.5" X 19.25" = 138.9g

Is there an internal overflow?, further reducing water volume!

Christ.... at first i thought i was getting a decent deal out of this tank, now not so much :fun5:

:lmao:

Yeah, the center internal overflow is 11x6"

This really now seems like false advertisment when I say I have a 180g tank. Kinda feel like the girl with the stuff bra.

 

[dzfish17]

I feel you, I used to do the same thing when I got my 600g (96x36x46) tank. I spent alot of time on the couch with my calculator trying to figure out the actual water amount. One day I finally realized that it was useless so I just call it a 600g. I will stock it for a 500g just to be safe.

Dave

 

[TheH]

http://www.hamzasreef.com/Contents/Calculators/TankVolume.php

138.9 is the closest I think. You can just assume that the tank height is 20 rather than 23 to account for the 1.5" sand and 1.5" water line. Keep in mind that the sand will absorb some water too, how much will depend (mostly) on the average particle size.

 

[geaux xman]

138.9gal and that doesnt even take into account the 11"x6" internal overflow(roughly 4gal). Add 100lbs of LR, I'm probably under 120gal.

I have 50lbs of DR cycling in a 20gal rubbermaid tote and it takes up 3/4 of the container.

I had originally planned on 100lbs of LR. Maybe I will have to look into a 75gal sump so I can dump all that LR into. Right now the plan is a 40g breeder for the sump.

 

[geaux xman]

Guys with 48x24x20 1/2" glass tanks using 18" height for water(1" sand+1"waterline) makes out to be 81.9gal.

100lbs of LR and they are looking at 60gallon of water in the tank tops in the display tank.

 

[albano]

Guys with 48x24x20 1/2" glass tanks ...
are looking at 60gallon of water in the tank tops in the display tank.

That coupled with the fact that their 50g sump is only 1/2 full, means that their 150g system, probably has less than 90g of water. A good fact to know when medicating or dosing.