Upgrade 75 or 90?

[Gibb72]

Looking to up grade my 55 reef to a 75 or a 90 there's a $68 dollar difference. Was wondering if was worth it to go with the 90 and the 4" more of water space, been told better for lighting to go with the 75. So not really sure what way to go

 

[Ericwm]

I personally went with the 90, it's not finished yet so I can't say it was the right decision but I think it was. I chose it for a few reasons, more volume means; the parameters will be more stable, I can have another fish or 2, i will have more viewing area, and I can have more rock while maintaining open swimming area. I went with LED lighting which I believe should have no issues penetrating the extra 4".

 

[Gibb72]

I have a 6 bulb T5 setup so was wondering if that will get down the extra 4"