KiwiGal77 Posted March 7, 2015 Report Share Posted March 7, 2015 The surface of the desk my 150L will be sitting on isn't quite flat - the edges appear to have raised a bit and there's the odd small lump or dip (all only a couple of mm off). I'm wanting to put a layer of ply between it and the polystyrene for the tank to sit on. What type and thickness would you recommend? Structurally the desk itself is solid enough to take the weight of the tank, it's just to give it a nice flat and smooth surface but needs to be strong enough to ensure it does remain flat and doesn't bend or crack due to the unevenness. Treated or untreated ply? Would MDF be ok or would it warp if it got any water on it? Thinking 15-20mm thick? Thanks! Quote Link to comment Share on other sites More sharing options...
KiwiGal77 Posted March 7, 2015 Author Report Share Posted March 7, 2015 Would this be suitable? http://www.trademe.co.nz/building-renov ... 734510.htm Or this? http://www.trademe.co.nz/building-renov ... 020369.htm Quote Link to comment Share on other sites More sharing options...
livingart Posted March 7, 2015 Report Share Posted March 7, 2015 both have mdf so will swell if wet, you could seal or paint to help make it more resistant should be able to go down to building supplies and get some ply cut to size Quote Link to comment Share on other sites More sharing options...
KiwiGal77 Posted March 7, 2015 Author Report Share Posted March 7, 2015 If sealed/painted MDF is suitable I'd rather go with that... ply is so expensive, and I've already blown my budget on the tank lol Quote Link to comment Share on other sites More sharing options...
David R Posted March 8, 2015 Report Share Posted March 8, 2015 Sitting a sheet of either ply or MDF on top of an uneven desk will not solve the problem. You need to create a flat rigid base that evenly supports the base of the aquarium. How uneven is the desk? Any pictures? Quote Link to comment Share on other sites More sharing options...
hovmoller Posted March 8, 2015 Report Share Posted March 8, 2015 +1 to pictures please. Being "only" a 150L tank it might be fine just using polystyrene. Also what are the tank dimensions and glass thickness? Quote Link to comment Share on other sites More sharing options...
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