I want to do a Design your Fish tank area.
So a member would put details of their tank in, Height width and length, the site then works out how many litres it is and how much fish it can hold in Centimetres, So member names their tank, saves it and begins to add fish to it.
Each fish has a size in CM, This is deducted off the total the tank details state you can have, SO Your tank is big enough for 100cm of fish and you choose a fish which is 4cm, so you now have 96cm of space left, you add 3 more of that fish to the tank so another 12cm is taken up.
However Im completely lost with the next bit: Some fish cant go together, Some fish you need more males to female, some fish are big and need a certain width tank.. SO if a member adds
It'll flag up notes like the following if needed, It'd be good if the notes where colour coded.
Fish A and D will fight.
Fish C is too big for your tank
Fish B you need 1 male to every 3 females