For loop is emailing one character per row in table - php

Question

I have been stuck on this problem for a while. My requirements are to email data from mySQL to a client. I took code from another page in my company's codebase that works when it is emailed.
The problem that I am encountering is that it is emailing only one character per row.
Here is my code:
$message = "
<br /><hr /><br /><table style='font-size: 12px; width:100%'>
<tr>
<td td width='25%'><strong>Oligo Name</strong></td>
<td width='10%'><strong>Base</strong></td>
<td width='10%'><strong>Scale</strong></td>
<td width='10%'><strong>Mod</strong></td>
<td width='10%'><strong>Mod Position</strong></td>
<td style='word-break: break-all; width: 500px;'><strong>Oligo Sequence</strong></td>
<td width='15%' style='text-align: right'><strong>Price</strong></td>
</tr>";
$SampleID = 0;
$maxrow = $OligoQty;
for ($i; $i < $maxrow; $i++) {
if(trim($SampleName) == '' && trim($Sequence) == '')
continue;
// $SampleID++;
$bases = preg_replace('/\s+/', '', $Sequence);
$seq_length = strlen($bases);
$message .= "
<tr>
<td width='200'>{$SampleIDS} . {$SampleName[$i]}</td>
<td width='40'>{$sequence_length[$i]}</td>
<td width='40'>{$SampleScale[$i]}</td>
<td width='40'>{$modification[$i]}</td>
<td width='40'>{$mod_position[$i]}</td>
<td style='word-break: break-all; width: 500px;'>{$Sequence[$i]}</td>
</tr>";
</tr>";
}
When I remove the for loop, it prints out the row perfectly:
I believe there is something wrong with my for loop that is causing it to do that and I am not sure why. I hard coded $maxrow to 2 and that is why I am getting 2 rows for the email. Any help would be appreciated!