Questions - Need some input

I just got an IPhone and was curious what good apps there are out there? Thanks

Today I found a good deal on an ATI Bubble Master 300, so I decided to purchase it. Getting the second skimmer purchased was one of the major roadblocks in progressing with my 245G/180G and Breeding Setup build. I now have a skimmer for both the dual in-wall tanks and the breeding set up. Both systems will hold about 500 G of water each. I have the above mentioned ATI and an ASM G6. Anyone have any suggestions as to which system would get which skimmer? Thanks for your input.