Thread: Moving bed calculations

Morning, I'm thinking if building my own moving bed filter. I've read that 1lt if media per 100lt if water is a good starting point. What I cant find is how much water per litre of media and hence the size of container needed once I know how media I'm going to use, if that makes sense. Any ideas? Thanks

Also looking to build this in a month or so, in the mean time if I buy some media, if I put this in a net in the pond will this mature or is that just a waste of time?

I only have a very small 1000l pond that I'm housing a few fry in, will move them on when they get bigger. Currently running an easypod. I'm using this pond to learn for a bigger build in the future.

Yeah exactly, trying to learn and get mistakes out of the way now rather than with a big pond and expensive fish. So for you 250l media, what's the capacity of the actual moving bed unit itself?

As previously said work out what you want to feed per day. For k1 they say it’s 5g of food per litre of k1. Maybe if everything is optimum (temperature, mechanical filtration, KH & PH) but I find that’s not accurate. Closer to 2g of food per litre for me.

Work out how many fish you have and more importantly the total approximate weight. From there figure out how much you want to feed them in the height of growing season. 1-2% is the norm. Then from there work out how many litres you need of k1. Then you want a bio chamber no more than 50/60% full. The bigger the better really to help with retention times.

This is more complicated than I imagined🤣 thanks for your help 👌 how much water per liter of media?

If you mean in your bio chamber 2L water per 1L of media

You ah that's what I mean Thankyou