Re-purpose preformed pond

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I have a 4yr old 500 ltr preformed plastic pond. 2 adult frogs, No fish!

My main problem is the maximum water depth (16 inches) is a problem, mainly during these increasingly hot dry periods here in the Suffolk area of the UK. Good job I’ve no fish, they wouldn’t last in this heat. There is so much green slimy algae at the moment that within a short time my filter aerator is constantly silting up. I have even added a dark Blue color liquid to help mitigate that but to no avail I’m afraid. There is so much algae that I have switched the filter off. It’s fair to say that for a couple of seasons now, I have been considering re-purposing the pond to that of a bog garden. Now I know it probably goes against what this forum is about but I thought I would ask anyway.
My main question is: Can this be achieved basically by making holes in the preformed plastic material allowing for limited drainage. Eg; too few holes and it could end up smelling and too many that would compromise the purpose of creating a bog in the first place.
There is very little information on what I’m asking.

The best I found was, if I I had a butyl liner then the spacing of holes on a garden fork would suffice. However, the preformed pond it was not quite the case as it would drain too quickly. Maybe 10 - 12 inches spacings would work. After which 5 cms of sand would be laid across the base. Then fill with soil in the usual manner. Again, information is vague, is it garden soil or pond soil. I quite like the idea of still being able to attract wildlife to my garden, including still being able to provide for my current, somewhat small frog family.
That’s about it, so far. So I thought I would cast my net further.

So, is my sketchy plan achievable?

I look forward to your comments.
 

j.w

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@Telsown1
I have tons of plants in my small frog pond and it stays nice and clear. I just have a small fountain pump in it and that's all, no filter. Parrots Feather plants, duckweed, Floating Hearts and Anacharis down under the water. One water lily which I keep forgetting to fertilize. This pond gets shade when the sun shows over it around noon or so. I think you need some shade too.
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I do not know who made or what your preformed is made from but the standard US preform your lucky to get 5 years . Dont know od ut on all the work just to watch it fail
 
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View attachment 172760@Telsown1
I have tons of plants in my small frog pond and it stays nice and clear. I just have a small fountain pump in it and that's all, no filter. Parrots Feather plants, duckweed, Floating Hearts and Anacharis down under the water. One water lily which I keep forgetting to fertilize. This pond gets shade when the sun shows over it around noon or so. I think you need some shade too.
View attachment 172761

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Hi J.W
You are so right, (good set-up you have there).

Definitely a ‘rookie’ error on my part when positioning the pond at the outset but in my defence, yes I have a 30’ pine tree that only provides shade to my garden as the sun moves round to the west. I have some grass species around the south side but alas they do not yet provide shade until later in the year when they are 7’+ but currently they are just 4’.
I guess one answer could be is to provide artificial shade but not quite in keeping with my cottage garden look. Or purchase a 10’+ mature tree.
It’s 7pm local time here and the sun is now behind pine tree. See pics.

Thanks for input.
 

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I do not know who made or what your preformed is made from but the standard US preform your lucky to get 5 years . Dont know od ut on all the work just to watch it fail
10 -15yrs. I’ll be in the ground myself at the latter end of that time.
 

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