Hello from Germany, I have owned a 12 gallon aquarium for 3 months. I only own soft corals and don't intend to use anything else. These corals are in the aquarium: 2x Xenia 3x Kenya 1x Sarcophyton Fiji 1x clove polyps coral And these animals are in the aquarium: 4x snails 1x banded shrimp I also have about 2 kilos of live rock in the aquarium and some small animals in the sand. But now I have a few questions, I'm running the tank without a skimmer because of the stocking. I feed the tank with a few pellets every few days so that the animals have something to eat. Currently I drive the pool with 10% water change per week. But I would like to work without changing the water, which is why I bought the All for Reef. Do you think that would work? Alternatively, I could also change the water once a month. I won't be able to do anything else soon due to professional changes, at least for a few months. I would be very grateful for tips. Thanks in advance.