Thread: New member with a question

what filtration are you currently running?

What are your water parameters at present? As you introduce more fish and your current one's develop, keeping on top of the water quality is paramount. As you are looking to home build, won't it also be down to aesthetics and what space you have to incorporate a moving bed? Bigger is better for sure..as is, something, regardless of size, is better than nothing..

Sounds like you already have it mapped out.. you can increase the amount of media needed, as both your knowledge and your fish grow. That'll probably help out, with the overall build costs too ..

Oase PondPads offer a huge biological settlement surface area and are capable of breaking down fish waste at the feeding rate of up to 215g of fish food per 10 litres of Pond Pads, every 24 hours.

Originally Posted by Barry Sims

Thanks, not heard of them I'll investigate.

https://www.youtube.com/watch?v=0ENZ733CH4I

Once you've decided on how much media you want, then when it comes to deciding on a suitable tank, ideally your moving bed filter contains at least double the volume of water to media. E.g. If you want 100l of k1 then the moving bed should have at least 200l of water in.

Remember, it won't be filled right to the top, plus the draw of a pump may drop the water level more, so include that deduction to get the real/working volume of the tank.

I emphasise the words 'at least', as you probably want a bit more than double the water, to ensure there is enough water and space for the media to move in.

I'd say 100 - 150l of k1 media for your set up is ample. Bear in mind that if you oversize the tank, you can always add more k1 later on if you end up overstocked.

I've built a DIY moving bed and I'd say just go for one larger tank, rather than a few smaller tanks.

I only say this as it'll involve less fittings e.g. tank connectors, media meshes etc... less points of failure/leaking and less time to build. Plus it should have a smaller footprint than multiple smaller tanks. It should also reduce the amount of airlines and air stones coming from the air pump.

I would recommend adding a purge valve at the bottom of the tank too.

That way if any crud builds up in the base of the moving bed, you can drain off some water which should remove the worst of it. It's much better than having to fish out the media with a net, disconnect the pipe fittings, draining down the old tank to clean it then getting it all back in place.

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