Hi, I'm having a bit of trouble getting rid of all the fish poop from my aquarium. Due to having a lot of rocks and plant, the poop gets stuck down inbetween the rocks and is really hard to get to with the siphon. In the end I've had to remove all the rocks in order to actually get rid of all of it. Any tips here? I'm also having quite a bit of trouble getting my new siphon started.