Scooterman
Well-known member
You got it, the over the top would be another CL independent of the OM CL
I got you a little crossed because You can supply a dart with a 1 1/2" BH & just up size the plumbing to 2" for the supply You'll loose a little gph this way but then you can use the second 1 1/2" BH for the second CL over the top.
Reason why I suggest two CL's Is because of the way an OM works, squirting out from only one port at a time, adding a second CL would add more flow throughout the entire tank, the OM CL would just be used to create random flows.
If you don't like the thoughts of drilling glass for two 1 1/2" BH's, then you can do an over the top suction for both CL's or just for one, this would add a 2" pipe into the tank but not so bad considering what your getting in return. The question would be how much flow do you really need or want? I'm just posing plans so you have more ideas to think about before you set it all up & realize you could use more flow. Tanks that size I would get several opinions on how much flow do you think you should have. If the glass is thick & you know someone who can do the drilling, to me after the first hole, making a few more is just as risky but the outcome could have awesome potential. Obviously this isn't something you do without lots of though, tanks aren't cheap & you have not much room for error, JMO!
If this was my tank, I would even consider making 4 of the 3/4" Heavy Duty bulkheads for outlets & 1 1/2" HD BH for the suction & put one 5,000gph pump on it for a CL. I'd do the OM over the top with over the top suction with the dart for the random flow. One way or the other would work out fine IMO.
What are the dimensions of your 180?
My tank is 125g 48"Lx25"Wx24"D, I could easily add 2 or 3 more thousand gph.
I got you a little crossed because You can supply a dart with a 1 1/2" BH & just up size the plumbing to 2" for the supply You'll loose a little gph this way but then you can use the second 1 1/2" BH for the second CL over the top.
Reason why I suggest two CL's Is because of the way an OM works, squirting out from only one port at a time, adding a second CL would add more flow throughout the entire tank, the OM CL would just be used to create random flows.
If you don't like the thoughts of drilling glass for two 1 1/2" BH's, then you can do an over the top suction for both CL's or just for one, this would add a 2" pipe into the tank but not so bad considering what your getting in return. The question would be how much flow do you really need or want? I'm just posing plans so you have more ideas to think about before you set it all up & realize you could use more flow. Tanks that size I would get several opinions on how much flow do you think you should have. If the glass is thick & you know someone who can do the drilling, to me after the first hole, making a few more is just as risky but the outcome could have awesome potential. Obviously this isn't something you do without lots of though, tanks aren't cheap & you have not much room for error, JMO!
If this was my tank, I would even consider making 4 of the 3/4" Heavy Duty bulkheads for outlets & 1 1/2" HD BH for the suction & put one 5,000gph pump on it for a CL. I'd do the OM over the top with over the top suction with the dart for the random flow. One way or the other would work out fine IMO.
What are the dimensions of your 180?
My tank is 125g 48"Lx25"Wx24"D, I could easily add 2 or 3 more thousand gph.