Quote:
Originally Posted by DragonFireSG
Clarity tower is a commercial foam fractionator. The link I supplied earlier is how you can DIY one for about $150-200. I need to build one soon for my own pond. Got most parts except the bio balls.
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You may be better off buying a second hand protein skimmer used for reef tanks - there is someone who used it for freshwater - search in youtube.
Alternatively, you may want to try ocean free hydra stream. I have been talking to qianhu staff and they advised that the hydra stream can break down DOC