Back in October I set up my 100 lt tank to grow out my dwarf pike cichlid .I had a cheap hob filter which I took some seeded media from another filter and within 7 days the tank was cycled. On the 25 th November the hob filter stopped working I put a sponge filter from another tank in to my 100 lt tank and put the seeded media from the hob filter into media bags and placed them in front of the sponge filter to get some flow on them it took me 2 days to get another filter managed to get a fluval 207 on the 27 th November since the tank seems to be cycling with ammonia hovering around 1.0ppm mark nitrite 0.25 ppm and nitrate 160 ppm some times lower some times bit higher I am using prime to keep the dwarf pike healthy the readings above were taken today I did a 50% water change yesterday is my tank now going through a full cycle did remove some dead crypts that just melted to nothing .