So an update on the situation, I still could not see a visable leaking point however I did some research on the tank and found a few reviews on the tank and found that the tank is likely to leak very slowly from the corners which looks to be the issue I'm having. I found this through an Amazon reveiw to whom left some pictures which I will include.
Now iv exepted that the tank out of the box sucks but if its just an issue of re sealing the tank it doesn't seem so bad however my issue is I believe the corner that is leaking is within the all in filter and seems challenging to be able to make a good seal in the area... Just wondering if anyone has any tips befor I try to seal it... Also I see that there is not alot of silicon on the edges to begin with (not enough to cut away) do it just isopropyl the edges and add silicone as is? Or is there a better process?
So a little update, I tried to seal the 14 but as expected the leak was in the aio portion and I could not get my hands in the filter properly so I scrapped the tank. The 20g replacement that was leaking, I sealed crudely with super glue which works; let's say not the best, but well enough to hold me over till my new tank arrived.
I went with the nuvo 20, as I should have in the first place and this is day 3 in the new tank... I lost my fish due to an ick outbreak under the stress (2 normal clowns, orchid dotty back, scooter blenny) and one discounted bleached flower nem from my lfs but all in all the coral look pretty good.