So browsing online i found a single piece of manzanita that will fill my 55 gallon. it will cost me about 135$ to buy and ship due to its size, its 48x10x22. i figure i can trim it down just enough to fit into my tank. my concern is will manzanita deteriorate and how fast. i have a freshwater tank about 78F and ph is approx 7.5 thanks for your time