I'd hazard a guess that there were about 6 school groups there today, so i was trying to avoid them. This was taken shortly after the windows had just been cleaned so there were no little kids around because there was someone working.
Zooman: oh right, well it is only a small zoo and it is located out of the way (plus it competes with Chester and the local attractions in the bay), so I guess they don't recieve mega-numbers of visitors
The pool is on top of a hill, and although there are nearby trees, I suspect the pool is in near-continuous sunlight in daylight hours (well, what passes in North Wales for sunlight - and I say that as someone who lived there for four years). I think it's simple algal. Not particularly attractive but unlikely to be harmful to the sealions.
Building this pool was a bit of an epic undertaking - the sealions originally had a cracked concrete thing - rather unpleasant - then were moved during the building works to what was effectively a huge garden pond - a rubber liner full of water. Before that, the fundraising seemed to go on for years. I was pleasantly surprised with how the new pool turned out, given the complications during its preparation.
