Peter,
i use to be total O-Natural,then got total covering with black-beard algie Due to keeping Discus I changed to Plastic (for easy cleaning).
I have a Masive Bamboo from Pets city ,the ones ment for Reptiles.
My others are from Wilkinsons £1.65 each got small medium and large and makes quite a good look.
I now whip them out from time to time into a bucket of diluted bleach,rinse,let dry and then replace.
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