ive always got a lot of advice from forums in the past when i was big into coral reef tanks and fish in general. i had to give it up when i moved to alaska but im back in california and decided to build what ive always wanted. a waterfall with pond. im learning as i go and had to start over and re build manytimes since the start. ive put some pics in my profile so please look and give advice. im in the process of figuring out what size pump to buy and how to design a water skimmer box and the placement of it.