Reef tank dive No. 4

Another iPhone dive in the reef tank in my office, taken roughly 18 months after the tank has been set up and 16 months after adding only coral fragments. Maintenance is very simple: foam fractionator, mechanical filtration (cleaned daily) and bio pellet reactor plus daily water change of 1,5 %, plus trace element concentrate twice per week (QFI), that's about it. Quite a big amount of fragments had to be taken out for several times. And finally I have a large colony of Knopia growing in the tank – that was hard to find over here ;-)

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