Slow Tank https://evenissa.com/ 2026-08-16T09:00:00Z Heat wave: keeping a 60-liter tank under 28 degreeshttps://evenissa.com/posts/heat-wave-under-28-degrees/2026-08-16T09:00:00ZThree days above 30 °C indoors pushed the tank to 29.4 °C. What helped, what did nothing, and what the shrimp did. Switching from gravel to plant soil without tearing downhttps://evenissa.com/posts/gravel-to-plant-soil-in-place/2026-03-02T09:00:00ZReplacing half the substrate at a time, over three weeks, kept the fish in the tank and the ammonia at zero. Mostly. The KH that would not stop fallinghttps://evenissa.com/posts/kh-kept-falling/2025-10-19T09:00:00ZCarbonate hardness dropped from 4 to 1 degree over two months and the pH started swinging. The cause was my own tap water, not the tank. Black beard algae on the slow leaveshttps://evenissa.com/posts/black-beard-algae-slow-leaves/2025-05-11T09:00:00ZA tuft on the anubias became a carpet over the sword plant in six weeks. Spot treatment with hydrogen peroxide, less light, and more flow eventually won. Fishless cycling in the cold monthshttps://evenissa.com/posts/fishless-cycling-cold-months/2024-12-07T09:00:00ZCycling a new filter sponge at 20 °C in a December kitchen took 31 days. The numbers, day by day, and the mistake on day 12. Why the tetras hide: flow, light, and the empty middlehttps://evenissa.com/posts/why-the-tetras-hide/2024-07-21T09:00:00ZNine neon tetras spent a month behind the filter. The fix was not more plants but a dimmer tank and a shoal that could see each other.