It's my first time setting up a freshwater tank. I want to get a flowerhorn in a 50 gallon tank. Here are my questions: 1. Most of the flowerhorn tanks I've seen are bare. No substrate nor decorations. Is it safe to put driftwood, gravel, rocks and plants in the tank? Or will the fish destroy the decorations? Or perhaps get wounded by the driftwood? 2. How often do I need to do water change? Is it 10% weekly like marine tanks? 3. What test kits should I buy? 4. What temperature should I maintain? Thanks in advance!