Hi I'm hoping to pick the brains of some of members with more of a engineering mindset than mine.
I bought a Juwel Rio 240 stand only with a load rating of 600kg to display my Fluval Flex 57 and APS 90l 60 x 40 x 40. It's a very old building and the floor is not level.

The Rio sits on 8 plastic feet and I've tried to use Packers from Screwfix (idea taken from another thread) to level the stand. The problem is floor is higher on the right side (as you look at it) than the left and higher at the rear than the front.

However having placed the flex on the cabinet I clearly haven't done a great job 😬. It was very difficult to try and level both ways and I settled on it being level front to back but not quite level right to left. There are no Packers under the rear feet.
You can see the waterline

And level tool

Oddly the tank on the left is level right to left (albeit empty).

Front to back looks like this
90l tank

Middle

Flex

Should I be worried? Ideally I'd like it level but it's really difficult to do and I can handle the visual aspect of it. I'm not keen on the stand being deformed but in this place the floors are awful.
I'm hoping once the 90l tank is scaped and full it will level with more of a uniform slight tilt left to right (right to left if you like 😁) if that makes sense.
Any advice is welcome!
I bought a Juwel Rio 240 stand only with a load rating of 600kg to display my Fluval Flex 57 and APS 90l 60 x 40 x 40. It's a very old building and the floor is not level.

The Rio sits on 8 plastic feet and I've tried to use Packers from Screwfix (idea taken from another thread) to level the stand. The problem is floor is higher on the right side (as you look at it) than the left and higher at the rear than the front.

However having placed the flex on the cabinet I clearly haven't done a great job 😬. It was very difficult to try and level both ways and I settled on it being level front to back but not quite level right to left. There are no Packers under the rear feet.
You can see the waterline

And level tool

Oddly the tank on the left is level right to left (albeit empty).

Front to back looks like this
90l tank

Middle

Flex

Should I be worried? Ideally I'd like it level but it's really difficult to do and I can handle the visual aspect of it. I'm not keen on the stand being deformed but in this place the floors are awful.
I'm hoping once the 90l tank is scaped and full it will level with more of a uniform slight tilt left to right (right to left if you like 😁) if that makes sense.
Any advice is welcome!