I definitely want to add the lock line how do I connect it to the 1" PBS pipe. Does that increase head pressure'?. I think I'll setup the 90g with one return with loc-line. Then for my 30g frag I'm going to buy a custom 30g extra long that will go over the sump on the same stand. I will use the same sump ill just use a seperate pump. I have a rio 2100+ that' pumps 200g/hour that would work well. I don't think I can run it externally though.
Do your calculations with a 3/4" pipe size. I wouldn't worry too much about loss from your loc line configs.
One return with loc line fittings is a good idea. You can get loc-line fittings that will spilt the flow. I have a "Y" split and use a hydor flo deflector (it rotates) on one and regular outflow on the other.
Without doing any crazy math, a 1100 gph pump on a 90 gallon with a single line 3/4" inch return accounting for probably about 3-4' (vertical height) head loss - sounds about right.
Do your calculations with a 3/4" pipe size. I wouldn't worry too much about loss from your loc line configs.
One return with loc line fittings is a good idea. You can get loc-line fittings that will spilt the flow. I have a "Y" split and use a hydor flo deflector (it rotates) on one and regular outflow on the other.
First shot is above water
2 - looking up - the hydor deflector is the thing on the left - it rotates and sprays water in circular flow pattern
3 - showing the water flow - creates bit of wave on surface of water