少し前にpinterestであった水槽レイアウトに惹かれた。 手前側少しが殆ど砂無し。玉石で後景との間が段差になり、手前には小石と砂が少々。後景にはグランドカバー状にモスかグロッソのような植物が植わり、手前に少し垂れている。 どこかコンテストの優秀作品らしい。自然の川にありそうな光景だ。
A few weeks ago, one picture of aquarium in PINTEREST attracted me. There is little sand and few small stones at front side. Round stones are piled to border much more soil in the back side and front side. The back sand is covered with moss or maybe some low height plants, and they are hanging on the border stones. This seems to be a prized layout at one contest. It looks like the scean you can find in a natural river.
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| 参考にした水槽の写真 The picture of aquarium I used as a model |
真似しようと思った。
I decided to mimic.
今、全面の土と水槽の間が藍藻の繁殖地になっている問題の対策にもなる。 数年前まで水槽中に繁茂していた藍藻の生き残りだ。藍藻はオキシドールで面白いように退治できたが，土中の物は完全に退治できない。増えるとオキシドールを注射するの繰り返し。水槽前面は光が当たるので藍藻の好みの環境になるのだろう。全面から土を除けば少なくとも目につくことはなくなる。
しかし、後ろの土砂を上手く堰き止めるのにはどうするか？今の水槽の底土をどう取り除くか等課題は色々あった。
Now, my tank has a problem; inside surface of the tank under the soil, there is a lot of cyanobacteria living that is the remains of when all tanks were covered with it a few years ago. Cyanobacteria can be easily abolished by directly pouring hydrogen peroxide solution sold at a pharmacy. However, the one in the soil is hard to kill completely. It has been the repetition of "when they grow, I inject." The layout solves the problem. I guess the reason they grow there is that light from outside illuminate the front side of the tank. If I remove soil from the front side they cannot stay there any more.
Still, there were unsolved issues like how to stop the soils falling from the back side, and how to remove soils without much mess, etc.
うちの水槽の底土は、ADAのソイル等を10年以上前に敷いた上にセラミックの砂利が乗っている。厚さは15cm位ある。出来るだけ泥水にしないで、しかも手抜きで行きたい。 うちのはクリプト水槽だから、それに合う雰囲気も必要。 今手持ちの石の関係もあり、上流のゴツゴツ石を使うことにした。過去の旅行等の収穫でストックは充分。
しかし、土留めの方法、工法はどうするか？うちの底土は半端なことではどんどん崩れそうだ。水の中で生き物も暴れるし、キチンと留めないといけない。 はじめ、透明プラ板を差し込んで前から石で押える計画が浮かんだ。薄板なら土にぐっと差し込んで前の土を除きながら石で押えられそうだ。複数枚に分けてやれば作業も楽そう。
でもなあ、なるべく人工物は使いたくない。 では、薄板の石で押える。これならいいか。先日買ったばかりの珪化木の薄板もある。
The soil of my tank is ADA soil laid more than ten years ago covered with newer ceramic stones on top. The thickness is about fifteen cm. I would have liked to remove the soil without creating mud water as little as possible and easy. My tank is mostly crowded with cryptocoryne, so it needs a design that fits to the plants. Thinking about stones that I already had had, I decided to use rough cornered stones that you can find at upper stream. Since I had been collecting those, I had enough store.
But, how should I stop soil from corrupting? The soil there must be well covered to prevent the fall, since creatures inside would disturb the surface frequently. First, I thought of using transparent plastic plates. Using thin plates makes it easy to push them into the soil before removing soil in front. If I use several split plates, the work would be not so hard. But, I kind of do not prefer to use artificial stuffs. Then, use thin stones. That would make it. I had several thin silicified wood plates that I bought about a month ago.
June 14, Saturday. I conducted a partial trial work. Reducing water as much as not killing fish inside, separating the water flow between water-purifying tank, I started to remove the soil in a quarter portion of the front of the tank. The plan had been a easy and clean one to drain the soil with water through a water hose used as a siphon. Soon it revealed, however, as a big failure; the soil was too much hardened through the pressure in more than ten years, the ceramic stones choked the hose, and only thing came out was water. Without any other choice, I started to scoop out the soil by a plastic soil scooper. The work was harder than I anticipated since soil was harder than I thought, the roots of cryptocoryne obstructed the scooper, and the water became just mud. A water bucket was filled with the soil only this partial trial, but anyway I fulfilled the initial objective, and concluded the day's work by filling up the tank with water again. The water was white and cloudy.
続く
To be continued.
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