I find that capillary matting with one end dipping into a reservoir of water works well. You can buy complete systems but it's easy to set them up yourself with trays, washing up bowls, bricks etc. etc. and capillary matting is available very cheaply on the internet (read the reviews though - some of the stuff sold is very flimsy).
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I find that capillary matting with one end dipping into a reservoir of water works well. You can buy complete systems but it's easy to set them up yourself with trays, washing up bowls, bricks etc. etc. and capillary matting is available very cheaply on the internet (read the reviews though - some of the stuff sold is very flimsy).