Aquariums and gardening.

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N-P-K
Fertiliser contains and hence plants all require these three things.
Nitrogen- for leaf growth
Phosphorous- for roots, flowers and fruit
Potassium - for general health and well-being

I fed my tomatoes tank water early in the season but because I had also enriched the soil with manure I soon found I was overdosing on nitrogen and not a lot else.
So had to switch to tomatoe feed.
Generally fish water will be low in the other two elements (I believe) and hence one reason for your poor flowers.
My tank water is great for the garden green plants, especially my bamboo which is generally going wild.
You can still use your tank water but might need to supplement with a low nitrogen fertiliser too, to cover the other two requirements.
I’m not familiar with you as a person here but have seen some of your posts and recognize your name around the forum. I just knew you would know which elements did what ☺️
 
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I’m not familiar with you as a person here but have seen some of your posts and recognize your name around the forum. I just knew you would know which elements did what ☺

I've actually met Dave! He's a top bloke. I wish I could meet more folks on here, but you're all too far away:cry:

I actually made myself a member of a gardening forum yesterday and posed the question of whether aquarium water alone would suffice as a good all round fertiliser for houseplants.

I was amazed how many were actually hobbyists too! The general consensus amongst those guys was along the lines of what Dave was getting at.

Aquarium water is great, you can't beat it in some respects, but many of them believed, through experience, that certain aspects of the plants development fell short when just using aquarium water.

Flowers were mentioned as one of the main ones, hence like Dave said, the smaller than usual flowers on my anthurium.

Many of the guys on there who use aquarium water also supplement it with off the shelf commercial plant fertilisers to compensate for some of those other trace minerals that aquarium water may be lacking. Potassium and phosphurus particularly were mentioned as very important ones.

So I'm going to the garden centre tomorrow. I'll be buying a general fertiliser......and probably another plant!!!! Lol.
 
I've actually met Dave! He's a top bloke. I wish I could meet more folks on here, but you're all too far away:cry:

I actually made myself a member of a gardening forum yesterday and posed the question of whether aquarium water alone would suffice as a good all round fertiliser for houseplants.

I was amazed how many were actually hobbyists too! The general consensus amongst those guys was along the lines of what Dave was getting at.

Aquarium water is great, you can't beat it in some respects, but many of them believed, through experience, that certain aspects of the plants development fell short when just using aquarium water.

Flowers were mentioned as one of the main ones, hence like Dave said, the smaller than usual flowers on my anthurium.

Many of the guys on there who use aquarium water also supplement it with off the shelf commercial plant fertilisers to compensate for some of those other trace minerals that aquarium water may be lacking. Potassium and phosphurus particularly were mentioned as very important ones.

So I'm going to the garden centre tomorrow. I'll be buying a general fertiliser......and probably another plant!!!! Lol.
Yea to met more people would be amazing!!!

I’m glad you got the answers you were seeking!

do post pictures of your new plant….I mean fertilizer ?

I almost picked up a Cordyline pink sister today but realized it might need more light than I can provide
 
Yea to met more people would be amazing!!!

I’m glad you got the answers you were seeking!

do post pictures of your new plant….I mean fertilizer ?

I almost picked up a Cordyline pink sister today but realized it might need more light than I can provide

A cordyline, as in the outdoor cordyline, or do they do an indoor variety too?

I have two hardy outdoor green cordies in planters. They're doing great, they've put some real growth on this year.

Initially I looked at the purple and variegated varieties but everything pointed to them being, well, drama queens, lol, not hardy outside at all, so I went with the trusted green ones.
 
A cordyline, as in the outdoor cordyline, or do they do an indoor variety too?

I have two hardy outdoor green cordies in planters. They're doing great, they've put some real growth on this year.

Initially I looked at the purple and variegated varieties but everything pointed to them being, well, drama queens, lol, not hardy outside at all, so I went with the trusted green ones.
This red sister was definitely situated with the indoor plants. I did read they were an outdoor plant and don’t fair too well with winds…pfff drama queens!

can you post a pic of your green variety?
 
The top pic is the day I got them. I replanted them both in my home made planters, with lashings of compost from my wormery, and just left them to it. The bottom pic is what they look like now. These things will grow huge in time.

IMG_20211002_154229_HDR.jpg

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Don't know if this is the one Central American species or a feral Australian or Asian variety.
It was dug up growing wild (feral) in the surrounding forest, it is growing well in the front yard, only about 50 yards from the Pacific, so it does get fairly breezy.
A07C4D69-C8CC-4990-A23C-BBBF152D621A_1_201_a.jpeg
30838F65-6519-4FED-B277-A58A2BB2CC19_1_201_a.jpeg
 
Don't know if this is the one Central American species or a feral Australian or Asian variety.
It was dug up growing wild (feral) in the surrounding forest, it is growing well in the front yard, only about 50 yards from the Pacific, so it does get fairly breezy.
View attachment 1505511
View attachment 1505512

Thanks for sharing.

I haven't got a clue what that top one is but it is stunning. In my care I can guarantee it wouldn't look like that, lol.
 
To be truthful I barely do anything except toss some used coffee grounds around it, and in-between rains, water with water change water from the outdoor tank.

You're lucky living the life of Robinson Crusoe on your little island. Those beautiful outdoor plants which are thriving in your lovely climate, would be house plants to most of us. And the vast majority of us, definitely me anyway, would struggle to provide for them whilst indoors, and they'd look nothing like your examples.
 
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