I am exploring the possibility of building a filter pit, with the knowledge that a gravity fed filter is better, but a pump fed unit is so much more convenient. If I did build one, it would have to go in this area:
Probably near this corner where my garden pond hardware is. The waterfall is on the other side of the fence near the corner.
My biggest concern is that I don't know if there is enough room. The narrowest area is 5 feet wide, but that is right up against my fence and mow strip. I haven't settled on a filter system, but if I went gravity fed, I'm leaning towards a Deepwater Koi Draco system and DIY shower. One of my goals for a new pond is a filtration system that is super simple to manage. How much room to either side of the filter assemblies is desirable for maintenance? I don't know the dimensions of Deepwater's system, but I guess that it is about 24" x 30". Add a pump and pluming, it will probably take up 5 feet before it goes to the shower? So, is 1 1/2 foot on either side of the filter system adequate for getting around it and keeping it clean?
I have other concerns besides space (and the fact that hand digging it will be a real biatch). I'm concerned that it will look ugly and that it will become a magnet for yard waste, critters (rats and black widow spiders) and standing water. Since there isn't enough space for a shelter, are there other ways to make it look inconspicuous without it becoming a shelter for critters?
To recap: before I decide on building a filter pit, I would like to receive opinions on if it would fit into my small space with enough room for maintenance, and alternatives to a filter house. Thank you.