power /injection

Hey guys. My mega tree is now up, run into a few issues with the pixels. I’ve used x connect 100 strand pixels from ray wu, I have 3 strands of pixels that seem to have some type of an issue with. Looks as if the last 50 pixels in a few of the strands are not working & flashing blue or red...

I am planning to replace about 50m of ropelights with pixel strip. In order to make it easier to mount The strip will be mounted in 5m lengths of "air seeder hose" The strip is 12v in 5m rolls with 30 LEDs per meter. Is this too long a gap between power inject points? Does 30 LEDs per metre...