- Joined
- Sep 9, 2019
- Messages
- 23
- Reaction score
- 22
Hi R2R,
Am in the planning stage of a new build, based on a nano sized, SPS dominant, barebottom tank with sump.
Came across the idea of using the weir wall as an underflow and overflow method of getting the display tank water to the sump filtration.
As I understand it the underflow means the back wall is two pieces of material that are offset (height. Front is slightly higher, so it does not rest on the base, ergo detritus passes under it, and the back piece is lower) and the two pieces are spaced apart. This creates a channel where the water passes under peice 1 up between the two and over the top of peice 2, all the while peice 1 also has a typical comb weir to surface skin.
The idea is less maintenace, being a barebottom some detritus will get sucked up the underflow and the floating bits still overflow, so I have a cleaner looking DT.
Does anyone have experience with this method?
Are there known pros and cons?
Resources for fluid dynamics...I take it the wider the space between the two pieces the more flow required? Which could be problematic for 3 to 5 times turnover...
Is this a bad idea...why isnt it more popular on paper it makes sense...
What do you think? Know...
Am in the planning stage of a new build, based on a nano sized, SPS dominant, barebottom tank with sump.
Came across the idea of using the weir wall as an underflow and overflow method of getting the display tank water to the sump filtration.
As I understand it the underflow means the back wall is two pieces of material that are offset (height. Front is slightly higher, so it does not rest on the base, ergo detritus passes under it, and the back piece is lower) and the two pieces are spaced apart. This creates a channel where the water passes under peice 1 up between the two and over the top of peice 2, all the while peice 1 also has a typical comb weir to surface skin.
The idea is less maintenace, being a barebottom some detritus will get sucked up the underflow and the floating bits still overflow, so I have a cleaner looking DT.
Does anyone have experience with this method?
Are there known pros and cons?
Resources for fluid dynamics...I take it the wider the space between the two pieces the more flow required? Which could be problematic for 3 to 5 times turnover...
Is this a bad idea...why isnt it more popular on paper it makes sense...
What do you think? Know...