It looks great so far. Your ground cover and texture is great, as is the weathering on the wood. But you're right about the water, it's a bit too blue and bright- it kind of leaps out at you.
If you're not happy with the water you have, try some acrylic gloss medium. I would use it uncolored, water in little streams and puddles is more clear than anything else. If you do tint the acrylic medium, go with green or yellow and use a tiny ammount of food dye. For example, to tint a tablespoon ammount of medium, I would dip a wooden toothpick in the food dye, shake off the drop on the end and stir the meduim with the dye-soaked toothpick. There is enough dye absorbed in the wood to mildly tint a tablespoon of medium.
There are other products out there used to simulate water, heat-and-pour polymers, two part resins, etc. I've found that acrylic medium is the least expensive and easiest to use to simulate small ammounts of water.
Be sure to experiment before trying anything on your dio.
Regards,
David G.