Fishdude3233
Aquarium Advice Addict
by mansineta do you Malaysian driftwood?
Coral uses calcium for health and growth. They are calcium based and will actually influence the pH. I would indeed remove the coral. Dead coral, as naturally eroding, will release calcium. I find that a HARD stone, placed in water at a rolling boil for 10 minutes to sterilize, make good decor. Even boil wood before adding to your tank.
Plants with Goldfish are trial and error. There are numerous articles listing safe or resistant plants (fast growing). Unfortunately, my guys mowed down everything even though they are fed a large ammount of veggies everday. Soft leaved plants are seldomly safe. They are supposed to just eat the feathery roots of Frogbit but mine eat the entire thing. I grow anacharis and duckweed in a separate tank to supplement their natural diet. Duckweed is devoured almost immediately. It is one of their favorites.
It is somewhat due to your specific fish. Two of mine in another heavy planted tank never ate my plants.
I recently discovered a tip that so far is working great. Mix real plants in amidst artificial ones. So far they haven't touched my real ones.
Anubias are fairly safe but without good water flow tend to accumulate algae.