Hi Trevor,
Thank you for your questions.
As i was typing out answers to your questions I realized there was a better source for you that will likely answer some of your questions in greater detail. I've simply added the address to the source with it's corresponding question below.
Q1:
I just received a big 10 person spa or is it called a gazebo,I dont know ,anyway its a big fibreglass pond.I am going to cover most of the air holes and use some of the air holes for filtering.what I want to know is,is ok to use the sand filter or is this to big?
A1:
Sand Filter: http://www.koifishponds.com/state_of_the_art_filters.htm
- covers great info on sand filters 'dos and donts'
Q2:
can fish live in a fibreglass pond?
A2:
Yes, fish can live in a fiberglass pond. Always keep in mind to limit your fish based on fish size and pond size. Keep reminding yourself that it's always best to have less fish than too many fish. Your goal with owning a pond is always balance. Balance is the key to a healthy ecosystem
Q3:
can I put trout in my pond?
A3:
You can put trout in your pond, again follow question 2 above. You likely wont be able to add many trout to your pond. There are some fiberglass ponds out there with Koi fish so if size is your worry..you can stop worrying.
All the best to you,
