upgrade 125gallon

Hi all! So I have a 125 long LPS dominated mixed reef that I run on a pretty tight budget. I slowly add corals and upgrade equipment over time and it has been up and running for about a year and a half now. Everything is doing well in the tank, most of the corals are growing, albeit slowly in...

I was thinking of upgrading tanks and I was curious I have a canister filter that’s a 525 and a 100 gallon protein skimmer I was also going to get a backup filter which has 400 gph could that work also it would be a predator tank is that enough gph or no

Hey guys have a question... I am going to be upgrading from a 75 g to a 125g... So my question is about the water ... Can I add 50g of new water to my existing water? Or will that shock the fish and coral?...