im planning on upgrading my FBT's enclosure and was wondering that when i fix my acrylic panels into my tank is it neccessary to glue them together first then silicone the joins?

Also what are the safest silicones and glues to use? I live in the UK too so may not get some brands that are available to youselves in other countries, but if you let me know the necessary guidelines i should be able to figure it out from there?

im so excited to start this little project my ideas are running through my mind at like 248793845 miles pre hour! haha

Thanks for reading fellow frog&toads lovers!

p.s. also any other hints and tips will be much appreciated!