Thiagu's 80 Gallon Bowfront - FO -> FOWLR -> REEF

I just thought of sharing my tank pics and video. It's been 4 months now and tank went through multiple changes from FO to FOWLR to Reef now.
I have taken some pics when tank setup few months back around March, can't stop myself thinking how much this hobby made us addicted . Please check video links for current setup.

Here's video link for current 80 gallon bowfront.
Also I have two fresh water tanks, here's 45 gallon tank Video link and 10 gallon video link.

Fishes included :

1 Yellow Tang
1 Blue Hippo Tang
1 Sailfin Tang
2 Tomato Clown
4 Green chromis
1 Firefish

Inverts :

30+ hermit crabs, 10+ turbo snails and 50+ other snails

Corals(all soft)

Brown Sinularia
Devil Hand
Cabbage Coral
Colt coral
Kenya tree
Xenia
Orange/purple ricordea
Few mushrooms and zoas

T5 HO 4 * 54watt light
Corallife protein skimmer
2 Sunsun rated 800GPH powerhead
Aquaclear 500 hang on filter

Need you guys help on these two things.

1. Currently i have crushed coral and I heard many evil things about them. however I didn't notice any issues so far like algae growth etc., Previous owner had it for 5+ years, so I am not sure if I need to replace them with live sand. Also much worried if it causes big cycle and also taking out all rocks/corals will be huge huge task. Am I OK to continue with CC?

2. I have proclear aquatics rated for 90 gallon wet/dry filter. Yes still have all bio balls and protein skimmer in it. I haven't noticed nitrates more than 10ppm so far, so am I good continuing with it or need to move on to sump or just remove bio balls? Again bit skeptical if this will cause beneficial bacteria to go off? I have about 40 lbs base rock and 50 lbs live rock, so I guess it's OK.

Actually no disease so far, all soft corals doing great, so wondering if I will be actually causing more trouble by replacing CC and we/dry filter to good running system

 

Looking good

You don't need to remove it if you siphon it every water change. Otherwise change out about 1/4 every week.

You can remove the bio balls about 1/4 every week also since you should have enough rock for your nitrogen cycle.