In order to improve the distribution of my pressurised CO2, im looking at adding a second diffuser. As the stem plants continue to grow, i find it harder to reach all the plants. Apart from the obvious drawback of the visual one,are there any other reasons not to try it. Ive considered putting it under the filter intake, like others have done,successfully. However coming from the old school of fishkeepers, im cautious about putting anything, but oxygen into the filter.