i have a juwel rio 180 (not yet running) and have just been reading george farmers article on algae. one of the reasons he says for getting algae is poor circulation. this got me wondering if i had enough circulation. so my question is 'will my standard juwel bio compact (big black box that sits in corner) circulate enough water to push the nutrients around and not creat any dead spots? if no then what can i do to increase circulation? thanks in advance!