Modular PVC Inline filter.

Gator

Fire Eel
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Aug 10, 2007
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This is my initial design on a DIY filtration system for my 600 gallon tank to replace my current sump filter. With this change I hope to get better water clarity and longer life from my pump because there will be more water pressure behind the pump assisting it in delivering the water back to the tank. So rather than buying another monster canister for $300-$400 I would stick with something more enjoyable than opening a box. If your a DIYer then you know what I'm talking about.

Before I started the design I knew I had to design something I could just turn a valve or two to remove the filter, open it up, clean, then close it back up replace and turn the valves back on. It also had to be able to handle the bio-load of the tank and be more effective at cleaning the water than my sump was. What I ended up with was a Modular PVC Inline filter. I figured out the cost without pump was just around $50 a piece going by the prices a Home Depot which was a lot cheaper than I thought it would be. Granted I will be redoing most of the plumbing on the tank but thats where all the fun is. So anyways here are my initial drawings please pick this apart now I need feedback now both good and bad before I start to build.

Here are the Parts involved.

I'll break down the parts a little here. The ball valves are there for obvious reasons to shut the water off to that filter for maintenance. The reason there are two at the bottom on either side of the bottom union is so when I remove the filter the water will remain in the unit itself and not spill out and to keep the water from being pumped out while the other 3 are still in use. Unions are there to make the whole thing removable. The reducing bushings are to take the pipe from 1" to 4" and back to 1" again. The important part is the male and female thread to slip adapters which will allow me to open the filter and clean the bio media and replace the coarse filter pad at the top and the fine water polishing pad at the bottom. I chose 4" pipe because its big enough to put my hand into and when you go higher the prices on some of the fittings jump. With the 4" pipe I figured out that a 4"x30" piece can hold 1.63 Gallons of Media or if I went with 36" that would be 1.96 gallons of media. I think I'm opting for the 30" since that will require me only buying one 10' section of pipe. The 4" to 2" bushing not only helps reduce the line down from 4" to 2" but its also concave which will allow me to put in some sort of rigid screen to hold the fine filter pad in place and not get sucked into the 2" opening and allow for better flow through the fine pad due to its shape.

This picture shows the assembled Filter and how I plan on supporting the filters and anchoring them to the wall.


This is how the filters will be lined up and the placement of the pump.


Here is a better view of how I plan on having everything lined up. 4 is all I can fit in there but all 4 filter modules will hold a total of about 6.5 gallons of media. The filters in this drawing are not scale this is just so I could fit them on paper.


TIA,
Gator.
 

jmart.cooper

Feeder Fish
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Dec 21, 2007
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A long way from Amphioxus
My only concerns would be the cost effectiveness, ease of maintenance and risk of creating an anaerobic environment for the BB. Not a bad idea, but personally I prefer sumps. They are much easier to customize and modify so you can always change what you have. I think on a smaller tank this would work well, but being so large I don't know if it could handle it. I apologize for sounding negative, maybe you will revolutionise the world of DIY, what do I know?
 

jmart.cooper

Feeder Fish
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Dec 21, 2007
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On a more positive note, I really like the way you drew it out. Some people give you one crappy pic and expect you to know what it is your talking about. The way you did made it much easier to understand and will make it easy for others to copy your plan.
 

Gator

Fire Eel
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jmart.cooper;2861288; said:
My only concerns would be the cost effectiveness, ease of maintenance and risk of creating an anaerobic environment for the BB. Not a bad idea, but personally I prefer sumps. They are much easier to customize and modify so you can always change what you have. I think on a smaller tank this would work well, but being so large I don't know if it could handle it. I apologize for sounding negative, maybe you will revolutionise the world of DIY, what do I know?
Can you explain your concerns in more detail? The cost is going to be around $300-$350 total and what part of this would create the anaerobic environment? lol Didnt take it as negative at all this is what I'm looking for.
 

jmart.cooper

Feeder Fish
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Dec 21, 2007
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Well I would think you could build a sump with a nice big W/D filter for about the same amount. I think it would be easier to build and possibly more effective. Clearly I have never built/used something like this before so I really cant say if it will be more or less effective than a W/D with sump. I like sumps because they give you more water volume, can easily be modified and they don't cost a lot to built. You can easily add filter socks, a UV sterilizer, an algae scrubber or a bunch of other things. You don't have to plan for these and its not difficult to add them later. The way I do it, because I don't have the cash to to it any other way, is to start basic then add stuff later to make it better and better.

As far as the anaerobic concerns, I would be afraid that if you did not have a very high rate of flow through the filters the bacteria would run out of O2 and then start to anaerobically break down the fish waste, which isn't what most people are going for, lol.

Honestly, I would like it if you would build something like this and test its effectiveness. Learning from others is much easier for me, lol. Its true that I dont like trying new untested things, which I guess makes me no fun, but I dont have the money to try things if I dont know if they will work.

Really what it comes down to is, if you like it, have the time and think it will work, go for it. I look forward to seeing what others say and what you end up doing.
 

Knowdafish

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Aug 12, 2007
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jmart.cooper

Feeder Fish
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Dec 21, 2007
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Well I may have misunderstood part of your plan, lol. Will the water overflow from the tank into the filter chambers? For a bit there I thought the water flow went from the pump to the tank, not from the tank to the pump. If its from the tank to the pump I think it would work better. Sorry, I did something I try not to do, I started ranting without fully understanding something.
 

jmart.cooper

Feeder Fish
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Dec 21, 2007
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A long way from Amphioxus
Well now I feel bad for being so negative and really want you to try this. I want to see how it turns out. Its too risky for me but heck if it works well for you then maybe one day I'll have to try something like it.
 
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