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Hi! Iv always had x5 (or even less) flow rate at my low-techs and everything is always fine but one must make sure that flow really gets everywhere, even to the bottom. I have also found importat keep bushes "airy", so flow get throw them and plants must not let be overgrow too bushylike.

Hi Bertie! I use hydroponic stores often when it comes to fixing/modelling pipes, spraybars etc. They have parts of same size as Eheim (plus dozen other manufactures) use, but muchmuchmuch cheaper. As a long spraybar, for exampel, I use long black rigid hose with self drilled holes. This costs...

Hi all! Thank you for your inputs, they have been great help and, once again, helps to understand how and why things happen/work as they do. And thanks Darrel for the link, have to take absolutely closer look on it! Cheers,

Hi! Thinking of this ever lasting discussion of how effective aistone is when it comes to oxynating the water, why doesnt it add nitrogen to water along the oxygen? Air contains nitrogen 78% and oxygen 21% so if O2 were dissolved why not nitrogen? Is N so hardly dissolved...??? I personally...