need overflow help
- Thread starter isistius
- Start date
stdreb27
Active Member
how unlevel is it? 1/4 inch or more? What we do to level our tank. ( I live in a house whose builder didn't believe in flat floors), is use wood shims, And just hammer them under the tank. I have a 180 gallon and it is full. Got to use HARD wood or it just breaks.
For the most part 1 inch should give you 600 gallons of flow if not a little more. most hob overflows top out at that diameter of hole. Even if you put a larger U tube or more u tubes it won't flow any faster. It is like having a 4 lane Highway cutting down to a 2 lane.
For the most part 1 inch should give you 600 gallons of flow if not a little more. most hob overflows top out at that diameter of hole. Even if you put a larger U tube or more u tubes it won't flow any faster. It is like having a 4 lane Highway cutting down to a 2 lane.
frankthetank
Active Member
Yea, I use wood shims on my 46bow too. I guess the floor is just unlevel where it sets. I never noticed it until I got my tank. I put two wood shims on the right side of it and hammered them in like ol' stdreb27 said. Works like a charm at leveling it out.
isistius
Active Member
well, the stand is level, but since my house was built in '25, i don't think they even knew what a level was. and that's nothing to say for all of the settling that takes place when its built on sand. heck, roll a ball down the hall, and it goes left, right, right some more, then left again, then back to me, then around my feet to the left....it just keeps changing direction.
as far as the overflow, i am using a stockman pipe, which should allow for more than 600 gph. right?
as far as the overflow, i am using a stockman pipe, which should allow for more than 600 gph. right?
stdreb27
Active Member
With two standard u tube overflows, and two drains, you should be pulling like 12 to 15 hundred gallon per hour. Way more than your 900 gph pump can pump out. I think you should be good. Putting bigger tubes in I don't think would help you much at all. I bought an overflow that size from jeff from lifereef, I'd email him and ask what he thinks, but I know that it keeps up with my 1100 gph pump with no problems.
stdreb27
Active Member
Do you have bubbles in your U-tubes? That overflow idea is pretty fail safe when done correctly. Make sure you don't have any bubbles in the tubes. Is your tank leaning forwards? or backwards? That can play with your flow rates. The level in the outer box must be lower than your dt level.
isistius
Active Member
Originally Posted by stdreb27
Do you have bubbles in your U-tubes? That overflow idea is pretty fail safe when done correctly. Make sure you don't have any bubbles in the tubes. Is your tank leaning forwards? or backwards? That can play with your flow rates. The level in the outer box must be lower than your dt level.
there are no bubbles. i always check for those. the tank is leaning forward. i am going to attempt to shim it up, but have no idea if it'll work. and i have lots of problems getting the level in the box lower than the dt. i have removed some of the teeth of 1 of the boxes to increase the flow, doesn't really seem to help. maybe i'll remove them all and use a piece of mesh of some sort. idk.
Do you have bubbles in your U-tubes? That overflow idea is pretty fail safe when done correctly. Make sure you don't have any bubbles in the tubes. Is your tank leaning forwards? or backwards? That can play with your flow rates. The level in the outer box must be lower than your dt level.
there are no bubbles. i always check for those. the tank is leaning forward. i am going to attempt to shim it up, but have no idea if it'll work. and i have lots of problems getting the level in the box lower than the dt. i have removed some of the teeth of 1 of the boxes to increase the flow, doesn't really seem to help. maybe i'll remove them all and use a piece of mesh of some sort. idk.
tx reef
Active Member
When I had the HOB overflow, the box inside of the tank would fill up pretty far if my u-tube had crud in it.
I don't know how long yours has been up, but you should clean the u-tubes out monthly. They get a lot of algae and other crud that builds up in them and restricts flow....
I don't know how long yours has been up, but you should clean the u-tubes out monthly. They get a lot of algae and other crud that builds up in them and restricts flow....
stdreb27
Active Member
Originally Posted by Isistius
there are no bubbles. i always check for those. the tank is leaning forward. i am going to attempt to shim it up, but have no idea if it'll work. and i have lots of problems getting the level in the box lower than the dt. i have removed some of the teeth of 1 of the boxes to increase the flow, doesn't really seem to help. maybe i'll remove them all and use a piece of mesh of some sort. idk.
I'd try raising the level of your inner box. Don't cut the teeth or what not that really won't help.
there are no bubbles. i always check for those. the tank is leaning forward. i am going to attempt to shim it up, but have no idea if it'll work. and i have lots of problems getting the level in the box lower than the dt. i have removed some of the teeth of 1 of the boxes to increase the flow, doesn't really seem to help. maybe i'll remove them all and use a piece of mesh of some sort. idk.
I'd try raising the level of your inner box. Don't cut the teeth or what not that really won't help.
isistius
Active Member
Originally Posted by TX Reef
When I had the HOB overflow, the box inside of the tank would fill up pretty far if my u-tube had crud in it.
I don't know how long yours has been up, but you should clean the u-tubes out monthly. They get a lot of algae and other crud that builds up in them and restricts flow....
i know theres a lot of coralline growth in the tubes. does that really make that much of a difference?
When I had the HOB overflow, the box inside of the tank would fill up pretty far if my u-tube had crud in it.
I don't know how long yours has been up, but you should clean the u-tubes out monthly. They get a lot of algae and other crud that builds up in them and restricts flow....
i know theres a lot of coralline growth in the tubes. does that really make that much of a difference?