about water:
what counts more, when you want a light water, is checking the dry residue. The water for newborns' formula is what I use for my kettle and for my piggies. It is very cheap here and its dry residue is 22mg/L (2,8mg calcium, etc). This is not a bad water for adults, it is only the proper water for those kidneys which require a certain care (newborns and some pets...). Many filters for water can only filter chlorine and some minerals, but they have no action on other substances.
Anyway, a piggie does not drink that much... especially when he can take the water from the vegs and from the grass. Your Ashbeck water seems to be very light.
My routine: in the morning one teaspoon of pellets; at 11a.m. they want some grass; at luch time again some grass; at tea time they have floor time and I give them some grass again... plus some pieces of pellets hidden on the corners of my kitchen. Sometimes I give them some salad... but they mostly eat hay and grass (hay is always available). In the evening they are still on the floor and I give again some grass...
at midnight when I put them into the cage I give them a huge amount of new grass and a piece of bell pepper, plus some slices of cucumber. They spend the night eating all the grass, the hay and the peel of the cucumber...
Now I am finding different kinds of grass... dandelion leaves, other green leaves, different strings of grass. This new grass, wild and born after the rain, is even more nutritious of the summer one (grown in private gardens) and both piggies have gained 30-40grams (since the start of the rain).