Looking on Ebay, Diversa and NACD appear to look the same.
I recently took delivery of a brand new NACD Aquarium. I had read many positive reviews about their aquariums.
Delivery took longer than stated. While i waited, and waited, i Googled 'NACD' and discovered this forum. To my horror, i read a post posted by someone who had a bad experience with NACD.
When the aquarium arrived, it looked fine, with cardboard on the top and bottom, complete with clear plastic wrap around the sides, protecting the glass.
On removing the plastic wrap, i could see quality cut 8mm glass, with smooth edges. So far so good.
On inspecting the quality of the silicone, the workmanship looked average. I own a Jewel aquarium, and the silicone work is high end factory quality. I did wonder if NACD aquarium was a one man band set up?
The silicone where glass meets glass looks ok. The silicone looks slightly iffy on the inside. Very thin weak. Take a look at this photo:
To me the silicone looks on the thin side.
On flipping the tank upside-down, i set about removing the brown paper on the bottom, stuck to silicone that had bled through the areas where the side panels meet the base panel. I spotted a 4inch line about 4mm deep, where there was no silicone.
The next thing i noticed. The thickness of the silicone from the bottom of where the front and side panels meet varied from 3mm or 4mm at the bottom to 1mm or 2mm at the top.
I decided to keep the aquarium and beef up the silicone on all internal corners, and filled in the 4inch line about 4mm deep on the bottom.
I used HA6 silicone (for aquarium) and the 45 degree 12mm option on a Fugi silicone tool. The results look better, stronger. After 24hrs the silicone set. I plan on waiting 7 days before adding water, to allow for 100% cure of the silicone.
Here is a photo. This is the first time i have ever attempted to silicone an aquarium.
I have thought about adding a length of black perspex along the top front to hide the area where water meets air (once the tank has been filled up).
This 4FT aquarium has been constructed using 8mm glass.
Many years ago, i owned a 4FT aquarium, and i recall it being constructed from 10mm glass.
I hope, once the tank has been filled up with water, all will be well.