Posted: 18/03/2015 at 13:59
I would ask you to please re-think your plan. Frogs - which are part of the web of wildlife in our country - are threatened by loss of habitat everywhere, and it's a shame that an established habitat, however it originated, should join the long list of sites which are destroyed on a whim. Just think that maybe your children will like frogs - most kids do - and maybe if you join in with them at a frog-related event at your local wildlife centre (wildlife trust, RSPB, ranger service, etc) you may gradually lose your detestation.
The benefits of frogs in gardens have been mentioned above. As to the safety aspects, I have installed grids on ponds and they work well. You may need to do a little cleaning and landscaping of your pond - you make it sound like a brick tank, but I'm sure it's better than that.
Give froggies a chance!