i used aquarium silicone to stick the cave together. dead simple and easy...
some of the plants are dying off, i`m going to start adding ferts this weekend not a full dose but it should just be enough to keep them ticking over till after the cycle....
most of the plants i`ve added are thriving apart from some slight browning that i believe is down to a lack of CO2 in the water, will have to keep an eye on it and possibly get a co2 system installed
And as for the filters i have a fluval 403 that i`m thinking of adding to the system but i`m not sure if this would be serious over filtration.....