New Diy sump Question

[customlifestylz]

Hello! I will admit first that i am new here and new to all things aquarium, but please before you tell me to hit the search button. Know that i have, many many times, And i believe i do have a basic grasp on what i want/need to do. Just want some help with fine details and be sure i have a realistic grasp on this. that said.

i am currently working on building a 75 gal tank for a turtle, with fish as well (not just feeders) so for the extra bio filtration needs i am seeing a wet dry system is best. I have seen many diy overflows (my tank is not drilled), and I am curious if the style i am seeing online the most is shaped like a spiral with tube height determining the water height. My concern is if i build this for the 2/3 water height would the siphon effect still be efficient enough to flow sufficiently if i used a larger say 1.5 pvc?

Also curious if a 300gph flow at 5ft height would be an appropriate flow rate to keep a good clear water with good filtration? I am diy building a filter out of a 29 gal tank for under the stand.

I am a do it right person first instead of redo after redo, but still love DIY projects which is why i am building rather than buying, so any additional tips or help would be greatly apprecated.

 

[leather]

My best advise is to get a canister or internal filter running first. You need to walk before you run. If you don't have the basics mastered then you don't want to get too far ahead of yourself. The diy pvc overflows can be very reliable and cost effective but you can have other problems (my first one sucked up a couple of my fish that I swore too big for it to happen to). There are many different styles, they will all work with a low water level. If you can post a link to the one you mean we can help you figure out flow for it.

 

[customlifestylz]

I would really rather not go with a canister for this setup, have a smaller canister on the tank that he's in right now and hate how often it clogs and the flow rate turns to a creep. And were getting a second turtle when its setup and running smooth. so want to know i have the filtration on hand. On the overflow I def plan on fabbing some kind of screen to keep anything from going in I dont want. As for not posting pic of what style overflow was hoping for ideas because i have seen varying ideas and variations, but the generic idea of what i was thiking is something like this one in the link. just without the 90 elbow at intake, thinking a 45 or something.

http://www.monsterfishkeepers.com/forums/attachment.php?attachmentid=16039&d=1139036668