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One final thought. In order to maximise flow and distribution, would there be any harm in plumbing both drain holes into a common pipe and take the filter inlets off that? With appropriate sizes shouldnt restrict inlet flow, and should be easy to arrange so that each filter can be isolated and...

Journal - yes will post one. In the planning stages I got some useful help and advice from Mark Evans and he made the same comment. However this tank is going to take some time to establish, so I am planning to take a series of pictures over time, and then post a journal once it's established...

I should add. I have been researching since April last year (almost full time!). Ordered custom tank in October. It is finally being delivered next week. I have sorted plants, substrate, fish, lighting, nutrition, CO2 and almost all other aspects of the tank. I have two CO2 cylinders ready to...

You guys are very helpful - thanks! As someone said earlier on the thread, the UK forums seem more useful than some of the better known international ones. 1) The loclines are for the return to the tank from the filters/pump, not the drain to the filters. The outputs from these can be at any...

Corki - Yes, keen to have optimal flow rate. That was another reason I planned in third standalone pump carrying CO2 as well. This would take flow rate well above required. If I dont do this will add in Koralia powerhead.

1) There will be an inlet strainer, similar to those widely used in marine tanks, and in North America. 2) CO2 distribution either via Hydor Koralia powerhead, or by option 2 where CO2 water is mixed with outputs from other two pumps, or by option 1 where intake to each filter will be at the...

3rd option (dont think it's realistic)

Option 1: Option 2:

Thanks for your continued interest/offers of help. I will need to hone my graphics skills to prepare and post up a graphic of the complete circuit. Will do this, however part of the issue is that there isnt a completed plan yet - the final layout is yet to be determined and will be subject to...

Thanks both. I plan to adapt the design accordingly. Corki - I posted this on several forums as it is a bit of an unusual question. Interestingly the only informative replies I received were on UKAPS and BIDKA - both UK non-reef forums. I posted it on reefcentral.com, which is an acknowledged...

Is it feasible to connect 2 external filters and an external pump together through a manifold type arrangement for return to two bulkheads in drilled holes in the bottom of a tank? Two eheim (2073) filters and an external pump – in closed loop from 2 drains and 2 returns in the bottom of the...

It is possible to buy dual stage regulators in the UK. I have recently purchased one. They vary from around £60 for an industrial model, to around £150 for a scientific grade one.