Alright it was full out cleaning day and i learned a few things. 2 bricks of coconut husk is way more than enough for a 40 gal tank maybe try 1 next time how much do you guys use? Anyway have someone else hold the BP when you are mixing it up because it is a pain when they try to crawl into the coconut husk as your playing in it. And why does she have this desperate need to knock the thermometer every time i set it back up? well done with that for a little while.