Weird Water Particles Bug

[ninjaconor]

I've been playing BigDig and have noticed that the particle effects in my water, which are normally blue, are now black. I've tried on two different computers and it's been the same. It hasn't happened with any other modpack I've tried. Here's a screenshot of what I mean:

 

With the default texture pack this isn't much of an issue, as the water colour is pretty dark anyway. However, when I change my texture pack to Sphax PureDB, the water is filled with ugly little dark dots like this:

 

These are really visible, even from far away. Has anyone else encountered a problem like this and do they know how to fix it? Thanks!